rubber o ring,with HNBR,used as air, water, oil tightness and seal in machine, car, pipe, medical equipment and so on ... . Shenzhen TEC Rubber Co.Ltd. is a major rubber sealing elements manufacturer ... Loop, U-type Loop, Y-type Loop, rubber strip, oil seal, rubber tubing and various rubber, appliances, hardware and machinery, hydraumatic & pneumatic, ...