Product Description Chilled Iron ShotSize 100 300 micron (0.1 0.3mm)Microstructure Cementite in a Martensite matrixForeign Matter less than 1.0 %Material Specification JIS G1215, JIS G1211, JIS H2601, JIS Z2504Hardness 60 HRC minDensity 7.0 gcc minShape 97.80%Void (10 % max allow) 1.60%Blow Hole (10 % max allow) 1.20%Crack (15 % max allow)