{"product_id":"salsbury-6-door-high-recessed-mounted-4c-horizontal-mailbox-4-doors-with-usps-access-rear-loading","title":"Salsbury 6 Door High Recessed Mounted 4C Horizontal Mailbox | 4 Doors  with USPS Access - Rear Loading","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Salsbury 3706S-04ARU is a USPS-approved, recessed-mounted 4C horizontal mailbox manufactured to USPS-STD-4C specifications for new construction and major renovation projects in apartments, commercial buildings, and residential developments. Configured as a single-column, 6-door-high unit at 23⅞\" tall, it accommodates 4 MB1 tenant compartments in a rear-loading configuration, one of the most compact compliant 4C footprints available designed for pass-through wall installations where carrier mail delivery is accessed from behind the unit through a heavy-duty rear access door with latch and continuous hinges. Well suited to very small buildings, tight vestibule alcoves, or companion use within a larger linked bank where both column width and height are constrained, the unit meets ADA reach requirements when installed per specified height guidelines. Constructed from heavy-duty aluminum with stainless steel hardware, the unit includes factory-installed trim and a 4C connector kit.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSecurity \u0026amp; Construction Features\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eUSPS-approved outgoing mail compartment with fixed front panel  no USPS master lock access door on front\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e4 tenant doors each fitted with a heavy-duty cam lock with dust\/rain shield and 3 keys\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeavy-duty rear access door with latch and continuous hinges for carrier mail loading\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOutgoing mail slot: 11¾\" W × ¾\" H with weather protection hood\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeavy-duty aluminum construction with stainless steel hardware\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDurable powder-coated finish available in aluminum, bronze, sandstone, and black\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFactory-installed 1\" W × ¼\" D trim for clean recessed installation\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eIncludes 4C horizontal mailbox connector kit for linking multiple units (hardware included)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eADA reach compliant when installed per height guidelines (top row ≤48\" AFF, bottom row ≥28\" AFF)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eISO 9001:2015 certified\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px; font-family: sans-serif;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"background: rgb(249, 249, 249); border: 1.5px solid black; padding-top: 8px; padding-right: 12px; padding-bottom: 8px; text-align: center; font-weight: bold; letter-spacing: 0.08em; font-size: 12px; text-transform: uppercase;\"\u003eSpecifications\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500; width: 40%;\"\u003eDimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e17\" W × 23.875\" H × 16.5\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e50 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eNumber of Tenant Doors\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e4 (MB1 Size)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eMB1 Door Dimensions\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e12¾\" W × 3¼\" H each\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eNumber of Parcel Lockers\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eNone included – parcel lockers available as separate units per USPS 1:5 ratio requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eColumn Configuration\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eSingle Column (1 Door Wide)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eUnit Height Category\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e6 Door High\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eLock Type\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eHeavy-Duty Cam Lock with Dust\/Rain Shield (3 Keys per Door)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eOutgoing Mail Slot\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e11¾\" W × ¾\" H with Weather Protection Hood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eCarrier Access\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eRear Access – Heavy-Duty Rear Door with Latch and Continuous Hinges (no front USPS master lock door)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eLoading Type\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eRear Loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eMount Type\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eRecessed Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eAccess Type\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eUSPS Access – Rear Loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eIndoor \/ Outdoor Use\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eBoth\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eADA Compliance\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eMeets ADA reach requirements when top row installed ≤48\" AFF and bottom row ≥28\" AFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003ePrimary Material\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eHeavy-Duty Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eHardware\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eFinish\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003ePowder Coated – Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eAvailable Colors\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eAluminum, Bronze, Sandstone, Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eIntended Use\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eApartments, Commercial Buildings, Residential Developments – New Construction and Major Renovations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eWhat's Included\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003eMailbox Unit, Factory-Installed Trim (1\" W × ¼\" D), Heavy-Duty Rear Access Door with Latch and Continuous Hinges, 4C Horizontal Mailbox Connector Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #f9f9f9; border: 1.5px solid black; padding: 8px 12px; font-weight: 500;\"\u003eModel Number\u003c\/td\u003e\n\u003ctd style=\"border: 1.5px solid black; padding: 8px 12px;\"\u003e3706S-04ARU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCompliance \u0026amp; Certifications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eUSPS Approved | ISO 9001:2015 Certified | ADA Reach Compliant (installation height dependent)\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eLead Time\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eUsually ships within 1–2 weeks.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eDownloads\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/Recessed_Mounted_4C_Horizontal_Mailboxes.pdf?v=1778309478\" rel=\"noopener\" target=\"_blank\"\u003eMore Product Information\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/4C_HORIZONTAL_MAILBOXES.pdf?v=1778309688\" rel=\"noopener\" target=\"_blank\"\u003eProduct Overview\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/4C_Recessed_Mounted_Horizontal_Mailboxes_3700_SeriesFRONT_LOADING_Installation_Instructions.pdf?v=1778309810\" rel=\"noopener\" target=\"_blank\"\u003eInstallation Instructions\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/Teachnical_drwaing.pdf?v=1778309892\" rel=\"noopener\" target=\"_blank\"\u003eTechnical Drawing\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/Technical_drawing_006779e0-9c5b-45a1-a89d-91c83271d59f.pdf?v=1778310069\" rel=\"noopener\" target=\"_blank\"\u003eADA Compliant Units\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/Standard_Recessed_Mounted_4C_Horizontal_Mailbox_Configurations.pdf?v=1778310158\" rel=\"noopener\" target=\"_blank\"\u003eProduct Configurations\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Salsbury Mailbox","offers":[{"title":"Aluminum","offer_id":49003986026724,"sku":"3706S-04ARU","price":756.0,"currency_code":"USD","in_stock":true},{"title":"Bronze","offer_id":49003986059492,"sku":"3706S-04ZRU","price":756.0,"currency_code":"USD","in_stock":true},{"title":"Sandstone","offer_id":49003986092260,"sku":"3706S-04SRU","price":756.0,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":49003986125028,"sku":"3706S-04BRU","price":756.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/9423\/4596\/files\/Salsbury_6_Door_High_Recessed_Mounted_4C_Horizontal_Mailbox_4_Doors_with_USPS_Access_-_Rear_Loading.png?v=1779451267","url":"https:\/\/securezoned.com\/products\/salsbury-6-door-high-recessed-mounted-4c-horizontal-mailbox-4-doors-with-usps-access-rear-loading","provider":"Secure Zoned","version":"1.0","type":"link"}