Steel City 531511234UB 4" Square Extension Ring, 1-1/2" Deep, 1/2" & 3/4" Knockouts, 21.0"° | Cooper Electric
Steel City 4 in. 21 cu. in. Square Box Extension Ring 531511234-20R - The Home Depot
Sigma Engineered Solutions Metal Weatherproof New Work Box Extender Electrical Box in the Electrical Boxes department at Lowes.com
RACO 187 Drawn Extension Ring, 22.5 Cu-in, 4 in L X W X 1-1/2 in D, Product Specific - Amazon.com
RACO 8203 Electrical Box Extension Ring, 1 Gang, 22.5 Cu-in, 4 in L X W X 1-1/2 in D, Color - Electrical Boxes - Amazon.com
RACO 2-Gang Steel New Work/Old Work Box Extender Electrical Box in the Electrical Boxes department at Lowes.com
Commercial Electric 1-Gang Metallic Weatherproof Extension Ring with (4) 1/2 in. Holes, Gray WSE450G - The Home Depot
Appleton 4SES :: 4" Square Extension Ring, 1-1/2" Deep, Drawn, Metallic :: PLATT ELECTRIC SUPPLY
Thomas & Betts 531711234 Steel City Extension Ring | Standard Electric Supply Co.
Steel City 53151 1/2 3/4 Pre-Galvanized Steel Square Box Extension Ring with 1/2-Inch and 3/4-Inch Knockouts - Ring Terminals - Amazon.com
3-1/2" Round Pan Box Extension Ring, 1/2" Deep - Drawn, Fixture Earss2-3/4" O.C. | Southwire
Appleton 4SSBESPL :: 4" Square Extension Ring, 1-1/2" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
SOU H4457 - Handy Box Extension Ring - BR Supply Inc
TP564 | Eaton Crouse-Hinds series square extension ring | Specifications | Eaton
Steel City 59361-1/2 Handy/Utility Outlet Box Extension Ring, Drawn Construction, 4-Inch Length by 2-1/8-Inch Width by 1-7/8-Inch Depth, Galvanized - Outlet Plates - Amazon.com
Raco 8201 Square Extension Ring, Drawn, 4", 1-1/2" Deep with Twelve 1/2" KO"s, Gray: Electrical Boxes: Amazon.com: Tools & Home Improvement
Steel City 53151-1/2-3/4 4 x1-1/2 Inch Steel Square Extension Ring with 1/2 and 3/4 Inch Knockouts | Cooper Electric
Hubbell-Raco 207 :: 4" Square Extension Ring, 2-1/8" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
4-11/16" Square Extension Ring, 1-1/2" Deep - Drawn, W/Conduit KO's | Southwire
Steel City 4 in. 1-1/2 in. New Work Deep Pre-Galvanized Metal Octagon Electrical Box Extension Ring 551511234-25R - The Home Depot
Commercial Electric 4 in. Round Metallic Weatherproof Extension Ring with (4) 1/2 in. Holes, Gray WRE450G - The Home Depot
3-1/2 in. Octagon Extension Ring, Drawn, 1-1/2 in. Deep, Four 1/2 in. KO's | 111 | Raco
Galvanized Steel, 1 1/2 in Nominal Dp, Extension Ring - 1RVU4|203 - Grainger
