O-ring seal (LRD-19) Material:NBR,EPDM,SILICONE,VITON,NR...... Size:AS568 and PG series,all size we can do O-ring ... seal (LRD-19)1.Material: NBR,EPDM,SILICONE ... ,VITON,NR......2.Size: AS568 and PG series,all state standare and ... us if you need them. HNBR O-ring seal (LRD-19)