1,pictures hdpe pipes 2, for pe100 from 20mm to 630mm; 3, ... ; 4, with pn0.4mpa, 0.6mpa, 0.8mpa...1. 1, pictures hdpe pipesPE water supply pipeMaterial:high quality PE80 or PE100Standard ... than 50 years under proper use6.Recycled and Environment-friendly pictures hdpe pipes with pe 100 and pe 80