Norton BlueFire - New & improved zirconia alumina/aluminum oxide - Highly versatile product that grinds and cuts a variety of materials with efficiency. MSDS Sheet Features: Enhanced performance & life - up to 20% vs. former Norton Charger wheels No other zirconia wheel will provide the superior performance-to-price ratio of Norton BlueFire Application: Typical markets - Welding, Metal Fabrication, Pipeline & Petrochemical, Foundry & Construction Specs: Abrasive Type Cut Off Wheel Diameter 4 in Arbor 3/8" Thickness 1/16 in Wheel Type Type 1 Straight Material Aluminum Oxide, Zirconia Alumina Specifications CO4116BF Trade Name BlueFire RPM [max] 19100