LEDENET 2pcs 86x86x40mm Recessed Electrical/Outlet Mounting Box White PVC Flush Type Wall Mounted Single Gang Junction Box Suitable for D1 D2 D3 D4 Panel touch LED Dimmer Controller Recessed box allows items, such as furniture, to be placed closer to the wall Plugs don't extend past the wall like a regular box For power or low voltage applications Installing Thread Hole Diameter : 4mm/ 0.16";Installing Thread Hole Center Distance : 60mm/ 2.4" Total Size : 86 x 86 x 40mm/3.4" x 3.4" x 1.6"(L*W*H)