... ,MOQ:5000pcs 3,Material: silicone 4,OEM & ODM warmly welcomed New Arrival Silicone O Rings:1,Performance: FDA grade, oil resistance, friction ... etc) 4,Certificate:ISO9001, SGS 5,Shipment terms: By sea, express or small truck 6,Usage: widely applied in faucets, toilets ... sizes are available upon request(OEM & ODM products warmly welcomed) New Arrival Silicone O Rings