1.Round socket end pvc ball valve 2.1/2-6",oneside handle 3.ANIS,JIS,BS,DIN 4 ... to a ball inside the valve. The ball has a hole, or port, through the middle so that when the ... flow will occur. When the valve is closed, the hole is perpendicular to the ends of the valve, and flow ... are therefore an excellent choice for shutoff applications.Size: 1/2" ~ 6"Industrial grade, maintenance free sealed unit and ...