... 3,ISO9001:2008 4,Welcome OEM&ODM inqu TPU Injection BallThermoplastic polyurethanes (abbreviated TPU) are a class of polyurethane plastics with many ... hardness for your option, including Buna-N (NBR), HNBR, VITON, Silicone, FluoroSilicone, EPDM, Teflon, Natural Rubber, BUTYL, SBR, Neoprene, HYPALON, etc ...