Features: Suitable for type 86 dark outfit switch, socket, led step lighting staircase mounting box, etc. Recessed in the wall, suitable for buried in concrete, which apartment hasniexclmacrt renovated Easy installation, light weight, transportation and corrosion resistance, resistant to acid, alkali and saltsHigh impact strength, resistant to compression and impact, fire resistance, with self-extinguishing function. Non-conductive, good insulation, resistant to 25KV voltage, ensuring a safe system. Easy connection by solvent cement and threading connection without leakage Application Installation during the construction process, electrical equipment, components. Applicable to residential, building and factory installation of electrical equipment. Stainless works like a metal pipe, gang box without the smell that attracts rodents, does not suffer from biotic attack. Specifications:Material: pvc 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 make a 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