1. Internal switch mounting box 2. 101mm x 67.5mm x 50mm 3. OEM service provided 4. Easy install, easy wiring Specifications:Standard "86" style Size: 101mm x 67.5mm x 50mmFor 1, 2, 3 ..Gang wall switchSalable and Safe Impace-resistance and long-term 101mm x 67.5mm x 50mm Internal Wall Switch Mounting Box