Steel Shot Specs: S70, S110, S170, S230, S280, S330, S390, S460, S550, S660, S780, S930, S1110Chemical compsition :C (0.85-1.2) , Mn (0.60-1.20) , Si(0.40-1.50) , S (0.05max) P (0.05max) , Cr (0.05max) Hardness :43-46HRC (Best at 45HRC)Density :?7.5g/cm3Normal packing : 1. 25kg/waterproof bag, 40...