... quality, new material of PVC2)Size: 1/2'',3/4'',1'',1--1/2'',2'',3'',3--1/2 ... can choice, for example, grey, blue, white and etc.4)Connector type: Thread and socket5)Standard: BS, ANSI, DIN, ... close quickly, lightweight.3)The fluid resistance is small.4)No vibration, and no noise.5)Each valve is ... pressure tested at the end after the factory, Lowest leakage rate.6)Quality: Heat, ...