1-Gang 1/2 in. Electrical Receptacle Box Extension Ring (5-Pack)

4 in. X 1 in. Metallic Steel Switch Box Extension Ring Box Conduit Fitting Accessory

4 in. 21 Cu. In. Square Box Extension Ring

1-Gang 3/4 in. Electrical Receptacle Box Extension Ring 5-Pack

1-Gang 1/4 in. Electrical Receptacle Box Extension Ring (5/Pack)

4 in. 21 Cu. In. Steel Pre-Galvanized Square Box Extension Ring

3/8 in. 1-Gang Outlet Box Spacer Extender (5-Pack)

4 in. PVC New Work Electrical Ceiling Box Mud Ring

Multi-Gang PVC Electrical Box Extender (2-Pack)

4 in. 1-1/2 in. New Work Deep Pre-Galvanized Metal Octagon Electrical Box Extension Ring

Round Metal Weatherproof Electrical Outlet Box Extension Ring With (4) 1/2 Inch Holes, Gray

1-Gang Metallic Weatherproof Extension Ring With (6) 1/2 in. Holes, Gray

4 in. W X 1-1/2 in. D Drawn Octagon Extension Ring With Two 1/2 in. And Two 3/4 in. Knockouts, 1-Pack

4 in. W X 1-1/2 in. D Steel Metallic Square Extension Ring With Six 1/2 in. KO's And Six CKO's (1-Pack)

1-Gang Metal Weatherproof Electrical Outlet Box Extension Ring With (6) 1/2 Inch Holes, Gray

1-Gang 3/8 in. Electrical Receptacle Box Extension Ring (5-Pack)

4-11/16 in. 2-Gang New Work Square Metal Electrical Box Extension Ring

1-Gang Metallic Weatherproof Extension Ring With (6) 3/4 in. Holes, Gray

1-Gang Metal Weatherproof Electrical Outlet Box Extension Ring With (4) 1/2 Inch Holes, Gray

1-Gang Metal Electrical Switch Box Extension

16 in. X 24 in. Range Adjustable Bar Hanger Box Conduit Fitting Accessory

1-Gang Metallic Weatherproof Extension Ring With (4) 1/2 in. Holes, Gray

1-Gang Non-Metallic Round Electrical Outlet Box Adapter, Gray

4 in W X 1-1/2 in. D Steel Metallic Octagon Extension Ring With Two 1/2 in. KO's And Two 3/4 in. KO's

LV2 Low Voltage Mounting Bracket: Arlington, Double Gang, Plastic

1-Gang Outlet Box Spacer Extender Combo Pack (5-Pack)

4 in. Round Metallic Weatherproof Extension Ring With (4) 1/2 in. Holes, Gray

2-Gang Metal Weatherproof Electrical Outlet Box Extension Ring, Gray

1/4 in. 2-Gang Outlet Box Spacer Extender (5-Pack)

2-Gang 3/8 in. Electrical Receptacle Box Extension Ring (5-Pack)

1/2 in. Weatherproof 4-Hole Single Gang Rectangle Extension

BELL 5400-5 Extension Box Adapter, 1 Gang, 9.5 Cu-In, 5-1/4 in L X 3-1/2 in W X 1-1/2 in D, 1/2 in. NPT , Gray

Arlington BE1R Setback Ceiling Box Extender, Fits 3-1/2" - 4" Round/Octagonal Boxes | Supplyhouse.Com

Steel City 59361-1/2 4" X 2-1/8" X 1-7/8" Deep Box Extension Ring W/ 1/2" Knockouts | Supplyhouse.Com