1.size: 1/2''-4'' 2.material:pvc 3.standard: JIS,DIN, BS,ANSI 4.application: ... , 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 ... and be popular for many people.Technical characteristics:1)Easy to install, easy to operate2)Applicable to ... the regular operation, open and close quickly, lightweight.3)The fluid resistance is small.4)No vibration, ...