... SILICONE,VITON,NR...... Size:AS568 and PG series,all size we can do. rubber ring (LRD-16)1.Material ... : NBR,EPDM,SILICONE,VITON,NR......2.Size: AS568 and PG series ... ,all state standare and non-state standard sizes are available3 ... ,blue,brown,green,red,yellow white..4.Well and high quality control5. Hardness: 30-90 ShoreA Please ...