Shenzhen Hanfeng Rubber Products Co.,Ltd is an experienced rubber O ring producer in China, the rubber seals products include O-ring,X-ring,Back up ring,V-ring,Square ring,gaskets,washers,rubber balls and customized rubber seals,ect. The sizes cover AS568,JIS,BS1516,DIN and Metric.We have in-house tooling workshop for the customized size to absorb the development costs and would assist with design & technical difficulties in high efficiency and quality.The rubber compound covers the NBR,FKM/Viton, Silicone,HNBR,EPDM,Aflas,PU,FFKM and others,which is original from Dupont,3M,Bayer and the other world brand supplier. Hanfeng have a full set of advance production equipment from vulcanizing to final shipment...