Model No: 386 pcs rubber o ring kit 5C Material: NBR Spec: 30 sizes, total 386 pcs, JIS B 2401 standard 1. 386 pcs rubber o ring kit 5C features :1) Material: NBR, FKM, EPDM, MVQ(Silicone)... 2) Model No. : 5C3) Spec: 30 sizes, total 386 pcs, JIS B 2401 standard4) Color of o-ring : black5) Color of box : red , yellow , green , blueCatalogue Details : Material NBR, FKM, EPDM, MVQ(Silicone)... ...