Big diameter butt-welding plastic pipes, with available diameters: 16, 20, 25, 32, 40, 50, and 63mm Aluminum-plastic pipes become more and more popular in the building.Features: 1) Specification: Φ16 - 63 2) Non-toxic, anti-corrosive 3) Light weight, strong mechanical properties and thermal-resistant ability 4) Low fragile humidity and long using life 5) Low flowing resistance inside the pipe, ...