Available in the following sizes: G10, G12, G14, G16, G18, G25, G40, G50, G80, G120 GP Steel Grit, (46-56 HRC) GP Steel Grit rounds off rapidly in use and is particularly suited for removing sand of casting and scaling oxide. GL Steel Grit, (53-60 HRC) GL Steel Grit is harder than GP Steel Grit. It loses sharpness during operation and is suited for plate and section preparation. GH Steel Grit, (60-65 HRC) GH Steel Grit has maximum hardness to maintain angularity during operation and provides a constant cutting (etching) action. GH Steel Grit is specifically designed for Air Blast Operations Chemical Composition of the products: C 0.70-1.20% Mn 0.60-1.20%, Si 0.40-1.20% Hardness: Steel grit: 42-66HRC Density: Steel grit: 7.6g/cucm High strength, long lasting Ervin life: Cast steel shot and grit: 2000 cycles; Steel cut wire shot: 2800 cycles.