25 in, Abrasive Length 3 in, Overall Length 8 in, Abrasive Material Aluminum Oxide, Grit 600, Compatible Tool Type Brake Cylinder, Wheel Cylinder, Operating Speed - Maximum 900 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 2 3/8 in, End Marking Color Pink, Stem Marking Color Black.