Specification:* Color: White* Material: White Aluminum Oxide (WA)* Granularity: 60 Grit* Outer Diameter: 150mm / 6-inch* Inner Diameter: 32mm / 1.26-inch* Thickness: 25mm / 1-inch Description:* High hardness, sharp edges and corners, good cutting performance and low grinding heat.* Widely used for grinding and forming of cutting tools, , gears, threads, thin-walled parts, etc.* Suitable for grinding of hard and heat sensitive steel, such as hardened steel, high carbon steel, alloy steel and so on. Instructions for use: * Please use at the specified maximum speed.* Please select the appropriate grinding wheel for appearance and sound inspection before installation.* Newly installed or used wheels every other day should be idling for more than one minute before use. Do not stand in front of the wheel.