1,o ring seal kit 2,various specification and good quality 3,NBR,VITON, ... . 4,make O-rings by customer`s drawing o ring seal kit1. Material: NBR, EPDM, MVQ(Silicon rubber), VITON.etc2.We ... to +/-3.05 shippment FOB SHANGHAI/NINGBO or International express packing inner:plastic bag outer:carton boxour Company and the equipment ...