... PVCSize:1/2,3/4Color:WhitePacking:Polybag,color box;cartonTHIS IS POPULLAR MODEL IN YEMEN,IRAQ,AND OTHER COUNTRIES.Tightness ... and drugs resistance Small resistance to fluidity,The fluid resistance is small . Strong mechanical strength,Applicable to the regular open ... Simple installation Not affect the water qulity and change the composition of water quality No fade, no canker, no aging, durable, ...