China Factory OEM Standard NBR Silicone O Ring Shandong Dongdu Auto Parts Co., Ltd. Base Info Model NO.:all sizesTrademark:DONGDUTransport Package:Carton BoxSpecification:NBR,HNBR,PEFE,Viton,EPDM,SiliconeOrigin:Rizhao Shandong ChinaHS Code:4016931000 Description Pre:Hardware Assorted Silicone O-Ring Next:ISO9001 & Ts16949 Approved Custom NBR Rubber Seal Ring Oring