... mold standard component,Air poppet valve: 1.Mat: Sus420; Hardness:48 2.Type:8mm,10mm,12mm,16mm,20mm 3.Good factory price mold ... standard component,Air poppet valve:This type of air poppet valve,high precision,easy install ... leaving the molds; 2.Easy installtion high precision and space saver; 3. Using air valves ... design and injection troubles.: mold standard component,Precision mold part