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4" Square Conduit Boxes 4-11/16" Conduit Boxes Conduit Body Electrical Boxes & Covers Handy Boxes Electrical Boxes & Covers Masonry   Gangable Masonry Boxes 2-1/2" Deep   Gangable Masonry Boxes 3-1/2" Deep   Masonry Box Covers   Solid Masonry Boxes 2-1/2" Deep Solid Masonry Boxes 3-1/2" Deep   Solid Masonry Boxes w/ F Brackets Electrical Boxes & Covers Multi-Gang Electrical Boxes & Covers Octagon & Round Electrical Boxes & Covers Stainless Steel Electrical Boxes & Covers Switch Boxes Electrical Boxes Plastic Fasteners, Hangers & Clamps Fire Alarm / Emergency Boxes & Covers Fittings, Hubs & Bushings Fixture Whips & Grips GFCI--Ground Fault Circuit Interrupters Grounding Products Lighting & Lamps & CFL Bulbs Service Entrance Products Switches, Devices & Receptacles Tools & Install Accessories Wall Plates Weatherproof Boxes & Covers Aerial Drop Wire Hardware Beam Clamps Bridle Rings Bulk Wire & Cable Cable Management Distribution Rings Fire Prevention Products J-Hooks Jacks, Face Plates & Bezels Patch Cables Rope, Twine & Pulling Tape   Electrical Boxes & Covers Masonry: Solid Masonry Boxes 3-1/2" Deep 1 Gang Solid Masonry Box 3-1/2" Deep 1 Gang Solid Masonry Box 3-1/2" Deep is designed for the mounting of switches, devices or receptacles in masonry walls & has stacked 1/2” & 3/4” concentric knockouts. Ears are formed inside the box to prevent mortar seepage. Gangs: 1 Width: 1-31/32" Knock Out Ends: 2 Knock Out Bottom: 2 Cubic Inches: 16.0 Depth: 3-1/2" TB-135 Call 866-770-4693 for details on volume discounts.