... carbon steel Size : 2# 0.150 inch ( 3.81MM )Hardness: < HR15T 78Condition: Annealed, Zincplated, Copper paltedApplication : Precision surface blasting for vesselsPrecision wet blasting (prep ... ,bottle, plastic box ,poly bag etc.Factory ProductionPacking shot ball for hunting,Steel shot BB shot 2# 0.150 inch ( 3.81MM)