Radiator Accessories :Nipple with O-ring,The material of O-ring have silicon and PTFE,Nipple with silica ge Radiator Accessories a.> STEEL nipples b.> for connections of radiatorsradiator(1).20 years professional die casting mold experiences,(2).ADC 12,International brand Aluminum , exclusive raw material for anti-corrosion die casting,(3).The 730.C liquid aluminum,die casted by 800T die casting ...