... 1Sizes:1/2" to 4" 2Types:A, B, C, D, DC, DP, E, F 3Material:PP-R High quality PP typeDF rubber coupling 1Sizes ... :1/2" to 4" 2Types:A, B, C, D, DC, DP, E, F 3Material ... and various otheracvanced production equipment.The factory has a group of strong force R&Dand design teamwork.Currrntly .we can manufacture various ...