... 8mm,10mm,12mm,16mm,20mm 3.Good factory price mold standard component,Air poppet valve:This type of ... space, also can exert very good function,plastic mould part.1. Its use in vacuumed condition in the deep ... the operation and the final products can leave the mold instantly;4.Air poppet valves are made from ... problems for molds design and injection troubles.: mold standard component,Precision mold part