... as customized 2,MOQ:5000pcs 3,Material: silicone 4,OEM & ODM warmly welcomed Silicone Sealing Ring:1,Performance: FDA grade, oil resistance, friction ... resistance etc 2,Toolings: more than 2 thousand toolings of o-rings, washers and gaskets 3,Color: free choice(black, ... white, green, red, brown, yellow, purple, pink, translucent, clear etc) 4,Certificate:ISO9001, SGS 5,Shipment terms: By sea ...