Features: Suitable for the type 86 dark outfit switch, socket, led step stair lighting mounting box etc Recessed into the wall, Suitable to be buried in concrete, which the apartment hasnt renovated Easy Installation, light weight, transport & Corrosion Resistance, resistant to acids, bases and salts High impact strength, resistant to compression and impact, Fire resistance, with self-extinguishing function. Non-conductive, good insulation, able to resist 25KV voltage, assuring a safe system. Easy Connecting by solvent cement and threading joining without leakage Application Installation during the process of construction, electrical equipment, components. Applicable to residential, buildings and factory installation of electrical equipment. No rust occurs like metal pipe, gang box with no smell attracting rodent, will no suffer from biotic attack. Specifications: Material: PVC Used For: 86 type Wall Switch Socket Outlet Size: app.78x78x48mm/3.07x3.07x1.89in Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Contents: 1 Pc x Junction Box