Morris Products 36550 Weatherproof One Gang Flanged Box Extension Adapter, 6 Outlet Holes, Gray, 5-1/4" Length, 3-1/2" Width, 1-1/2" Depth, 3/4" Outlet Hole Diameter, 2 Closure Plugs Weatherproof One Gang Flanged Box Extension Adapter - 6 Outlet Holes - A universal Weatherproof Electrical Box Extension Adapter 12.8 Cubic Inch Capacity Length 5-3/16 X Width 3-15/32 X Depth 1-9/16 Powder Coated Box Extension Adapter Includes Closure Plugs Gasket & Mounting Screws Supplied