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 0.0350 in Wheel Type Type 1 Straight Material Aluminum Oxide, Zirconia Alumina Specifications CO4035BF Trade Name BlueFire – RPM [max] 19100