... .tooling&production 3.rich experience in this fieldrubber mould, specially for insulators, arresters, hollow core insulators, cable accessory, cable jiont, ... auto part etc. the material is suitable for HTV, LSR, NR etc.1.Mold cavity: design according ... .9.we also have rubber inject machine for testing the mould, so you do not worry about testing. HTV mould for line post insulator