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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 Electrical Boxes & Covers Octagon & Round Electrical Boxes & Covers Stainless Steel Stainless Steel Boxes   Stainless Steel Covers 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 Stainless Steel : Stainless Steel Boxes     PAGE: 1 of 1 3 Style(s) Available  4” Square, 1/2" & 3/4" "Chicago Plenum" Knockouts, Stainless Steel Electrical Box: 2-1/8” Depth Electrical Boxes are installed in walls and ceilings for switches, devices and light fixtures. Depth: 2-1/8” Type: Drawn Plenum Rated Size: 4”Square Knockout Ends: (8) 1/2” & (4) 3/4” Knockout Sides: Vapor Tight Knockout Bottom: (3) 1/2” & (2) 3/4” Material: Stainless Steel . Call for volume discounts. From $13.61 4-11/16” Square, 1/2" & 3/4" "Chicago Plenum" Knockouts, Stainless Steel Electrical Box: 2-1/8” Depth Electrical Boxes are installed in walls and ceilings for switches, devices and light fixtures. Depth: 2-1/8” Type: Drawn Plenum Rated Size: 4-11/16”Square Knockout Ends: (8) 1/2” & (4) 3/4” Knockout Sides: Vapor Tight Knockout Bottom: (3) 1/2” & (2) 3/4” Material: Stainless Steel . Call for volume discounts. From $31.88 4” Square, 1/2" & 3/4" "Chicago Plenum" Knockouts, Stainless Steel Electrical Box: 1-1/2” Depth Electrical Boxes are installed in walls and ceilings for switches, devices and light fixtures. Depth: 1-1/2" Type: Drawn Plenum Rated Size: 4”Square Knockout Ends: 1/2” & 3/4” Knockout Sides: Vapor Tight Knockout Bottom: (3) 1/2” & (2) 3/4” Material: Stainless Steel . Call for volume discounts. From $31.99   PAGE: 1 of 1 3 Style(s) Available    View/Edit Order | Checkout   Enter your Priority Code for special savings   Provide your zipcode for real-time freight cost