New Arrival Silicone O Rings: 1,Shipment: as customized 2,MOQ:5000pcs 3, ... Material: silicone 4,OEM & ODM warmly welcomed New Arrival Silicone O Rings:1,Performance: FDA grade, oil resistance, friction resistance, ... resistance etc 2,Toolings: more than 2 thousand toolings of o-rings, washers and gaskets 3,Color: free choice(black, ... request(OEM & ODM products warmly welcomed) New Arrival Silicone O Rings