UNILETS Outlet Box, Number Of Outlet: 1, Material: Copperfree (4/10 Of 1 PCT Maximum) Aluminum, Size: 3/4 IN, Cable Entry: (1) 3/4 IN GRE Hub, Cubic Capacity: 18 CU-IN, Knockouts: No, Cover Opening: 3.38 IN, Form Number: 1, Height: 3-3/4