... A, B, C, D, DC, DP, E, F 3Material:PP-R High quality PP typeDF rubber coupling 1Sizes:1/2" to ... production equipment.The factory has a group of strong force R&Dand design teamwork.Currrntly .we can manufacture various plastic products ... theUnited States, Japan,South Korea.We have passed ISO:9001quality management system standard and the ISO14000 environmentalmanagment system standard. Quality guidline ...