HUBBELL WIRING DEVICE-KELLEMS Extension Cord with Outlet Box: 25 ft Cord Lg, 12 AWG Wire Size - 5LY81|SPB2 - Grainger
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Metal Power strip box heavy duty 12/3 extension cord plug adapter 20amp to 15amp | eBay
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New! Extō Martha Blue by Conway Electric - The Conway Electric Store
4-Outlet Box C664502001 - The Home Depot
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Iron Forge Weatherproof Water Resistant Extension Cord Connection Box, Outdoor Plug Cover for Electrical Connections, Power Tools, Power Strips for Landscape and Holiday Lighting - Green - - Amazon.com
CBI 25ft Metal Quad Box Power Cable 4 outlet box 20amp Sideways Plug Blade | eBay
DIY Extension Cord With Built in Switch - Safe, Quick and Simple : 5 Steps - Instructables