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UltraPro Porcelain Light Socket with Pull Chain Light Fixture, Light Bulb Socket, Medium Base, Indoor Lighting, Mount on 3-1/4” or 4” Box, 250VAC/660W, UL Listed, White, 18303 - Light Sockets - Amazon.com
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Maxxima Keyless Porcelain Lamp Holder, One-Piece Medium Base, Outlet Box Mount, 660W (2-Pack) - - Amazon.com
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