... high or low resistance ,high tenacity, satisfy customers' different applicatioin well.2) merits: pretty twisting pattern , sophisticated manufacture, ... : 232PSI4) fatigue test: 100.000times incessantly cycle test5) different inner container: ABS \ FRP \ PE6) opening diameter: ... 2.5’’thread – 6’’ flangeColor: Different colors are available, deep blue, sky blue, gray, natural ...