... etc. Item nameO RINGMaterialNBR,HNBR,SBR,EPDM,FPM,SILICONE,VITON,NR,CR, PU etcSizeCustomized /standard /nonstandardsuch ... fieldsAutomotive, Transportation, Filling Machinery, Food Machinery, Oil exploitation, Sanitary plumbing, Medical Machinery, Textile machinery, Mining machinery, Exercise ... to meet customized requirements on o-rings. High Purity Graphite Ring from Baofeng Five-Star Graphite Co., ...