... , 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 ... end after the factory, Lowest leakage rate.6)Quality: Heat, high temperature, extremely long usage life for at least 10 yearsApplication ...