Steel City 4-11/16 in. 2-Gang New Work Square Metal Electrical Box Extension Ring 73151 1/2 3/4 - The Home Depot
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
Extension Rings - Weatherproof Products
Southwire 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 55151-S-UPC - The Home Depot
Steel City 4 in. 1-1/2 in. New Work Deep Pre-Galvanized Metal Octagon Electrical Box Extension Ring 551511234-25R - The Home Depot
RACO Steel New Work/Old Work Box Extender Electrical Box in the Electrical Boxes department at Lowes.com
4" Square Extension Ring, 1-1/2" Deep - Welded, W/Conduit KO's | Southwire
TP564 | Eaton Crouse-Hinds series square extension ring | Specifications | Eaton
RACO 187 Drawn Extension Ring, 22.5 Cu-in, 4 in L X W X 1-1/2 in D, Product Specific - Amazon.com
Slab Box Extension Ring - Kraloy Fittings
Nauticam N120 Extension Ring 70 with lock
Appleton 4SES :: 4" Square Extension Ring, 1-1/2" Deep, Drawn, Metallic :: PLATT ELECTRIC SUPPLY
Classic Hopper Extension Ring
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
Commercial Electric 1-Gang Metallic Weatherproof Extension Ring with (4) 1/2 in. Holes, Gray WSE450G - The Home Depot
Galvanized Steel, 1 1/2 in Nominal Dp, Extension Ring - 1RVU4|203 - Grainger
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
SOU H4457 - Handy Box Extension Ring - BR Supply Inc
RACO 2-Gang Steel New Work/Old Work Box Extender Electrical Box in the Electrical Boxes department at Lowes.com
Hubbell-Raco 653 Handy Box Extension Ring | Standard Electric Supply Co.
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
Hubbell-Raco 207 :: 4" Square Extension Ring, 2-1/8" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
Appleton 4SSBESPL :: 4" Square Extension Ring, 1-1/2" Deep, Welded, Metallic :: PLATT ELECTRIC SUPPLY
4-11/16" Square Extension Ring, 1-1/2" Deep - Drawn, W/Conduit KO's | Southwire
