... making,good quality mold steel,hot runner plastic bottle preform mold,plastic bottle blowing mold,plastic bottle preform mold for PP,PE, ... which makes the accuracy of bottle mouth,bottle neck and screw thread, as well as sealing ability.No joint seam,no ... HRC45-48 screw thread neck:3Cr13 HRC45-48 Moulding board:45# HRC25-28 Other products:Injection blow machine,extruder blowing machine,plastic bottle ...