NBR rubber ring Material:NBR,EPDM,SILICONE,VITON,NR....... Size:AS568 and PG series,all size ... do. NBR rubber ring (LRD-15)1.Material: NBR,EPDM,SILICONE,VITON,NR.......2.Size: AS568 and PG series,all state ... standare and non-state standard sizes are available3.Color: black,blue,brown,green,red,yellow white..4.Well ... hesitate to contact us if you need them.. NBR silicone viton NR rubber ring