Norton Quantum Surface Grinding Segment, Type 31, Series: 3NQP, 11-1/4 in Width, 8 in Height, 3 in Thickness, 30 Grit, Ceramic Alumina Abrasive, F Hardness Grade, Vitrified Bond, ME100703B Blueprint Number, Applicable Materials: 300/400 Series Stainless, Cast Iron, Ductile Iron, Gray Iron, Hard Carbon Steel, Super Alloys, Tile, Titanium and Tool Steel, For Chuck Type: Cortland and Cortland Bonus, Porous Porosity