... new material of PVC2)Size: 1/2'',3/4'',1'',1--1/2'',2'',3'',3--1/2'',4''3)Many color available you ... can choice, for example, grey, blue, white and etc.4)Connector type ... be popular for many people.Technical characteristics:1)Easy to install, easy to operate2) ... The fluid resistance is small.4)No vibration, and no noise.5)Each valve is pressure ...