... of PE solid wall, drainage pipes, fittings, gas pipe, the specification dn20-630, the annual output of nearly 10,000 tons, quality assurance ... , innocuous and green material for building, can be used in the drinkingwater-supply system directly2. Low temperature-resistant, good frozen-resistant ... warm, saves energy4. Light but strong, good wearable5. Material: PE6. Specification (unit: mm): customized