ball cock 1) stainless steel,copper,ron 2) semi-ball cock, cutout cock, ball core ... , anti-stone cock 3) train,railway ball cock1) material: stainless steel,copper,ron or as demand2) semi-ball cock, cutout cock ... , anti-stone cock,ball core cock, cutout cock, copper valve, iron valve,stainless steel valve, machining parts,brake pads and so on. ball cock