Rubber 'O' Rings are mainly used in plastic tube or steel tube, could use in table water Features: 1) Rubber Gaskets Main raw materials: NBR, NEOP, NR, BR, EPDM, IIR, H-NBR, PU, ECO, FKM, SI, CSM, ACM/NBR/PVC2) The rubber products are mainly used in high plastic tube for water purpse3) size could from 1mm to 1000mm4) we have own CNC workshop to make this mold5) All manufacturing process confirm ...