4" Square Extension Ring, 2-1/8" Deep - Drawn, W/Conduit KO's | Garvin Industries
Extension ring 22" (57cm) - Ribolator
4" Square Plenum Extension Ring, 1-1/2" Deep - Drawn, W/Conduit KO's | Garvin Industries
Sigma Engineered Solutions 1-Gang Gray Metal Weatherproof New Work Standard Box Extender Exterior Electrical Box in the Electrical Boxes department at Lowes.com
4 in. Square Extension Ring, Drawn, 1-1/2 in. Deep with Twelve 1/2 in. KO's: Electrical Boxes: Amazon.com: Tools & Home Improvement
2 Pcs, 4 in. Round Pan Box Extension Ring, 1/2 in. Deep, Zinc Plated Steel Used to Mount Ceiling & Wall Lighting Fixtures to Provide Additional Wire Capacity - Amazon.com
1/2" Octagon Box Ring Extension - Amazon.com
ReceptXtenders 1-Gang 1/2 in. Electrical Receptacle Box Extension Ring (5-Pack) HD50004 - The Home Depot
4 in. x 2 in. Handy Extension Ring, Drawn, 1-7/8 in. Deep, Eight 1/2 in. KO's | 665 | Raco
IHE Red Dot 1G Blank Extension Ring
73171-1 - Steel City 73171-1 - 4-11/16" x 2-1/8" Deep Square Box Extension Ring, 1" Knockouts
Hubbell Raco 2 Set 4-11/16 in. Square Extension Ring, Drawn, 2-1/8 in. Deep with Eight 1/2 and Four 3/4 in. KO's: Amazon.com: Tools & Home Improvement
Hubbell-Raco 187 :: 4" Square Extension Ring, 1-1/2" Deep, Drawn, Metallic :: PLATT ELECTRIC SUPPLY
Source Square Extension Ring box 4X4 Electrical Metal Junction Box on m.alibaba.com
4" Octagon Extension Ring, 2-1/8" Deep - Drawn W/Conduit KO's And Fixture Ears 3-1/2" O.C. | Garvin Industries
531711234 - Steel City 531711234 - 4" x 2-1/8" Deep Square Box Extension Ring w/ 1/2" and 3/4" Knockouts
Steel City 4 in. 21 cu. in. Square Box Extension Ring 531511234-20R - The Home Depot
Galvanized Steel, 1 1/2 in Nominal Dp, Extension Ring - 1RVU4|203 - Grainger
Extension Ring With Roasting Stand | COBB Grill America
Nauticam N120 Extension Ring 70 with lock
Electrical Contrustion BS 4568 Conduit Malleable Iron Extension Box / Extension Ring - China Conduit Junction Box Cover, Round Box Cover | Made-in-China.com
Steel City 4 in. 1-1/2 in. New Work Deep Pre-Galvanized Metal Octagon Electrical Box Extension Ring 551511234-25R - The Home Depot
Garvin 57111 4 Inch Round Pan Box Extension Ring, 1/2 Inch D
Hubbell-Raco 262 2-1/8-Inch Deep Drawn Square Extension Side Knockouts - Walmart.com
