uxcell 86mm x 86mm x 40mm Plastic Dual Sockets Mount Back Box for Wall Socket Product Name : Mount Back Box;Type : 2 Sockets Color : White;Material : Plastic Box Size : 86 x 86 x 40mm/ 3.4" x 3.4" x 1.6" (L*W*T);Screw Dia. : 4mm/0.16" Net Weight : 56g Package Content : 1 x Mount Back Box for Wall Socket