... O-ring service kits.Good quality and best pricesMaterial: NBR and Viton or as customer request.ROHS approved.Hardness: 60- ... , model no: 5A[2]30 sizes, total 382pcs, JIS B 2401 standard, model no:5B[3]30 sizes, ... total 386pcs, JIS B 2401 standard, model no: 5C[4]32 sizes, ... standard, model no:8B[5]32 sizes, total 419pcs, JIS B 2401 standard, model no: 8C Non-standard size ...