... ,PE size:16,20,25,32 Cert.: ISO9001,CE OEM service PE-AL-PE Pipe (for cold water)1>Material:outside ... ,inside:PE(every layer is agglutinated by hot melt adhesive)2>Way to welding:over-lap welding(Ultrasonic overlap and laser” and ... welding of overlap and laser” )3>Size:16*2.0,20*2.0,25*2.5,32*3.04>Color:any color5>Certification ...