... the size from 2mm to 200mm. The shape has round pipe, square pipe, unique shape according to your design or practical use ... inner walls reduce pressure loss and increase flow speed6. Sound insulation(reduce by 40% compared to galvanized steel pipes)7. Extremely ... we are reliable,tooWHAT ARE PRODUCED?PVC granule/material, PVC pipe, PVC profile, PVC connector/injectionWHY YOU CHOOSE PERFETC PLASTIC?You ...