... we are expert in producing rubber inject mould, specially for insulators, cable accessory, auto part etc. 1.OEM2.passed ISO 9001-2000 2 ... , hollow core insulators, cable accessory, cable jiont, auto part etc. the material is suitable for HTV, LSR, NR etc.1.Mold cavity: design ... we also have rubber inject machine for testing the mould, so you do not worry about testing. HTV mould for line post insulator