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Amazon.com: Waterway Mounting Ring Extension 519-6560 : Patio, Lawn & Garden
Raco 111 3-1/2" Octagon Extension Ring: Amazon.com: Industrial & Scientific
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Amazon.com: 1/2" Octagon Box Ring Extension : Patio, Lawn & Garden
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Greenfield Made in The U.S.A. Weatherproof Electrical Outlet Box Extension, White, (RB25AWS) - - Amazon.com
Hubbell-Raco 111 Extension Ring Ceiling Outlet Box, 11.8 Cu-in, 3-1/2 in Dia X 1-1/2 in D, 3-1/2"
