About Us    New Product Ideas    Custom Mfg.    Contact	847-455-0188
4" Square Conduit Boxes 4-11/16" Conduit Boxes Conduit Body Electrical Boxes & Covers Handy Boxes Electrical Boxes & Covers Masonry Electrical Boxes & Covers Multi-Gang   Multi-Gang Box Partitions   Multi-Gang Boxes 1-5/8" Deep   Multi-Gang Boxes 2-1/2" Deep   Multi-Gang Device Covers Raised 1/2"   Multi-Gang Device Covers Raised 3/4"   Multi-Gang Extension Rings 1-5/8" Deep Multi-Gang Extension Rings 2-1/2" Deep   Multi-Gang Flat Covers BLANK   Multi-Gang Flat Covers DUPLEX   Multi-Gang Flat Covers GFCI   Multi-Gang Flat Covers TOGGLE 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 Multi-Gang: Multi-Gang Extension Rings 2-1/2" Deep 8 Gang Multi-Gang Box Extension Ring 2-1/2” Deep 1/2” & 3/4” Concentric Knockouts , also know as an extension collar, is designed for increasing the cubic inch capacity of a pre-selected Multi-Gang Box. Electrical-Supply.net offers Multi-Gang Box Extension Rings/Collars from 2-10 gang & 1-5/8” or 2-1/2” deep. Length: 17-11/16” Number of Gangs: 8 Cubic Inch Capacity: 188.8 Knockouts Sides: (20) Knockouts Ends: (4) Depth: 2-1/2" GBEX-2128 Call 847-455-0188 for details on volume discounts.