... bearings 13/64 inch size ,5.159mm bearing ballsHigh Carbon High Chrome Steel Balls of material SAE52100 Grade-5 & Grade-10 We would ... )material:AISI52100 GCr152)Size:1/8",1/4",3/16",5/16",5/32",3/8"3)Grade:G10-G10004)Hardness: HRC60 ... ≤0.03≤0.0251.35-1.65100CrMn60.90-1.050.5-0.71.00-1.20≤0.03≤0.0251.35 ... -1.65Packing We packed the balls in cartons:One type inside having two box;One type ...