... 4.06MM) Model : steel shotMaterail : low carbon steel ballSize : 1# 0.160 inch ( 4.06MM )Hardness: < HR15T 78Condition: ... Annealed, Zincplated, Copper paltedApplication : Precision surface blasting for vesselsPrecision wet blasting (prep-job)Military precision stabilizers.Military ... , plastic box ,poly bag etc. Factory ProductionPacking 1# shot ball for hunting 0.160 inch ( 4.06MM)