These vitrified grinding wheels are suitable for use on most types of bench grinders. Made from aluminium oxide for normal grinding of ferrous metals. Features: For use on most types of bench grinders Bore: 31.75mm Bore: 31.75mm Supplied with 19.05, 15.88 & 12.7mm reducing bushes Specifications: Dimensions: H:26.5 x W:2.5 x D:19.0 cm Colour: Grey Guarantee:5 years Material: Tungsten Carbide Model Number: FAIGW15016M