25 in, Abrasive Length 3 in, Overall Length 8 in, Abrasive Material Diamond, Grit 170/200, Compatible Tool Type Brake Cylinder, Wheel Cylinder, Operating Speed - Maximum 1,000 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 1 3/4 in, End Marking Color Red, Stem Marking Color Yellow.