... , 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:PP-RCOMPANY INTRODUCTION Ninghai Xinming Hard&Plastic Factory.Iocated in Science ... Europe and theUnited States, Japan,South Korea.We have passed ISO:9001quality management system standard and the ISO14000 environmentalmanagment system standard ...