... ( HRC)HRC58-65ApplicationBicycle, bearing, pulley, slide, handcraft, shelf, luggage, hardware, grinding mediaStandardGB/T-308-2002, GB/T1148-93Matched StandardDIN, JIS, ASMECertificationISOPackingOily ... originalShandong province, ChinaDeliveryWithin 30 days or confirmed while placing order Cement alloy steel ball 25.4mm