19 in, Abrasive Length 2 1/2 in, Overall Length 8 in, Abrasive Material Silicon Carbide, Grit 400, Compatible Tool Type Brake Cylinder, Wheel Cylinder, Operating Speed - Maximum 1,000 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 14 mm, End Marking Color Yellow, Stem Marking Color Not Applicable.