plastic ball valve 1)material: Plastic, 2)conection:coupler/ thread, 3)medium:water,oil,acid,,alkali ect 4.Size: ... /2" ~6" plastic ball valve 1)material: Plastic,2)conection:coupler/ thread,3)medium:water,oil,acid,,alkali ect4.Size:1 ... valve name plastic ball valve material plasticconnection form BSPT/ NPT quick coupler-male/female thread size 1/2" 3/4" 1" 11/4 ...