Model No: rubber O-ring kit assortment 8C Material: NBR Spec: 32 sizes, total 419 pcs, JIS B 240 standard. 1. rubber O-ring ... kit assortment 8C features :1) Material: NBR, NR, FPM, MVQ, EPDM2) Model No. : 8C 3) Spec ... box : blue,red,yellow,green2. We have below O ring kits: Model No.SizeTotal PcsStandard5A30 sizes382 pcsAS568 standard5B30 sizes382 pcsJIS B 2401 ...