... : Good quality, 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: Thread ... lightweight.3)The fluid resistance is small.4)No vibration, and no noise.5)Each valve is pressure tested at the end ...