Taiwan standard air valve,precision mold part: 1.Mat: Sus420; Hardness:48 2.Type:8mm,10mm,12mm,16mm,20mm 3.Good factory price Taiwan standard air valve,precision mold part:This type of air poppet valve,high precision,easy install, save space, also can exert very good function,plastic mould part.1. Its use in vacuumed condition in the deep and closed molds, or it can be used for having problems ...