--- product_id: 37648909 title: "Southwire MSBMMT3G 3 Gang Multi Mount Device Box with Depth Adjustable; Heavy Duty 42lb; Gray" brand: "southwire" price: "$38" currency: BBD in_stock: true reviews_count: 11 category: "Southwire" url: https://barbados.desertcart.com/products/37648909-southwire-msbmmt3g-3-gang-multi-mount-device-box-with-depth store_origin: BB region: Barbados --- # Depth adjustable for flexible installs ½" conduit knockouts for clean cable management 42lb heavy-duty strength Southwire MSBMMT3G 3 Gang Multi Mount Device Box with Depth Adjustable; Heavy Duty 42lb; Gray **Brand:** southwire **Price:** $38 **Availability:** ✅ In Stock ## Summary > 🔧 Elevate your smart home setup with the box that means business. ## Quick Answers - **What is this?** Southwire MSBMMT3G 3 Gang Multi Mount Device Box with Depth Adjustable; Heavy Duty 42lb; Gray by southwire - **How much does it cost?** $38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [barbados.desertcart.com](https://barbados.desertcart.com/products/37648909-southwire-msbmmt3g-3-gang-multi-mount-device-box-with-depth) ## Best For - southwire enthusiasts ## Why This Product - Trusted southwire brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Safe Voltage Separation:** Built-in low voltage dividers let you mix power and data lines safely in one box—perfect for modern smart setups. - • **Maximized Cable Capacity:** Removable interior blocks boost cubic inch space—more room for your smart home wiring without compromise. - • **Pro-Grade Cable Management:** ½" knockouts compatible with blue tube or PVC conduit ensure a sleek, professional finish every time. - • **Versatile Mounting Mastery:** Supports both horizontal & vertical installs with removable nail tabs for seamless metal stud mounting. - • **Durability Meets Compliance:** High-impact polycarbonate construction with UL Listing & RoHS compliance guarantees long-lasting, reliable performance. ## Overview The Southwire MSBMMT3G is a heavy-duty, 3-gang multi-mount electrical box designed for flexible horizontal or vertical installation. Featuring depth adjustability, removable interior blocks for increased cable capacity, and ½" conduit knockouts, it streamlines professional-grade cable management. Built with high-impact polycarbonate and compliant with UL and RoHS standards, it ensures safe separation of mixed voltages and long-lasting durability for modern smart home and home theater applications. ## Description Southwire’s thoughtful design includes ½" knockouts for quick conduit connections and built-in wall dividers to safely separate mixed voltages. That means you can run power and data lines in the same box without worry. Review: Strong and durable - Good box. durable and solid Review: Ok - Heavy duty ## Features - Designed for both horizontal and vertical installations, this low voltage mounting box includes removable nail tabs for easy metal stud mounting and top blocks for secure vertical placement—perfect for flexible home theater or TV setups. - Removable interior mounting blocks allow for increased cubic inch capacity, giving you more room for cables and connections without compromising safety or performance. - Includes ½" knockouts compatible with blue tube or PVC conduit, streamlining your cable management and ensuring a clean, professional installation every time. - Low voltage wall dividers enable safe separation of mixed voltages within the same box—ideal for combining power and data lines in modern smart home applications. - Made from high-impact polycarbonate and backed by UL Listing and RoHS compliance, this box includes heavy-duty mounting screws for secure installation and long-lasting reliability. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00H8NV1WS | | Best Sellers Rank | #2,518 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Electrical Outlet Boxes | | Brand | Southwire | | Brand Name | Southwire | | Color | Gray | | Customer Reviews | 4.6 out of 5 stars 140 Reviews | | Finish Type | Painted | | Global Trade Identification Number | 00784297017728 | | Included Components | MSBMMT3G | | Installation Type | Nail-On | | Item Dimensions D x W x H | 3.5"D x 5.9"W x 3.82"H | | Item Type Name | 3-GANG MULTI-MOUNT ELECTRICAL BOX | | Item Weight | 0.2 kg | | Manufacturer | Southwire | | Material | Polycarbonate | | Model Number | MSBMMT3G | | Part Number | MSBMMT3G | | Product Dimensions | 3.5"D x 5.9"W x 3.82"H | | Specification Met | Ul | | Style | Multi-Mount | | UPC | 784297017728 | | Unit Count | 1 Count | ## Product Details - **Brand:** Southwire - **Color:** Gray - **Material:** Polycarbonate - **Product Dimensions:** 3.5"D x 5.9"W x 3.82"H - **Style:** Multi-Mount ## Images ![Southwire MSBMMT3G 3 Gang Multi Mount Device Box with Depth Adjustable; Heavy Duty 42lb; Gray - Image 1](https://m.media-amazon.com/images/I/61U1vyUQwPL.jpg) ![Southwire MSBMMT3G 3 Gang Multi Mount Device Box with Depth Adjustable; Heavy Duty 42lb; Gray - Image 2](https://m.media-amazon.com/images/I/71jfkaz+B-L.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Strong and durable *by B***T on June 12, 2025* Good box. durable and solid ### ⭐⭐⭐⭐⭐ Ok *by M***E on June 19, 2026* Heavy duty ### ⭐⭐⭐⭐ Pretty good box *by A***A on April 15, 2018* It is a little hard to break the tabs at back where wire slides in. if you use the separator for non-voltage cables on one side of the box, be prepared to have to widen the opening somehow to let HDMI go through. The fact that you can screw it to the stud makes up for the inconvenience. Make sure to line up properly before screwing into the stud otherwise it will be slanted at the opposite side, not leaving a nice flush look after you put cover --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://barbados.desertcart.com/products/37648909-southwire-msbmmt3g-3-gang-multi-mount-device-box-with-depth](https://barbados.desertcart.com/products/37648909-southwire-msbmmt3g-3-gang-multi-mount-device-box-with-depth) --- *Product available on Desertcart Barbados* *Store origin: BB* *Last updated: 2026-08-10*