Name: Electrical UPVC One way extension ring DINMaterial: UPVCStandard: DINSize: 20mm ~ 25mmElectrical UPVC One way extension ring DIN Description: Non-conductive: good insulation,Website:http://www.tupipe.com, able to resist 25kv voltage, assuring a safe system.Fire resistance: self-extinguishing, do not support combustion.Corrosion resistance: resistant to acids, bases and salts, assuring a lower maintenance cost and a longer performance life.Impact strength: resistant to compression and impact, suitable to be buried in concrete.Easy installation: light weight, easy to transport, handle and install. They are installed with solvent cementing and threading joining.Electrical UPVC One way extension ring DIN Specification: Size (mm)2025