... ,grey,blue,red,black Color Thread or socket UPVC ball valves Steady and reliable quality, 100% gas sealing test. ... different marketFull size include 1/2",3/4",1",1-1/4",1-1/2",2",2-1/2 ... ",3",4",6"Different shapes include round and octagon.Full ... making pipes and fittings into whole, leakage effectively prevented.4) Excellent heat insulation property from minimum thermal conductivity (only ...