31 in, Abrasive Length 5 in, Overall Length 13 1/2 in, Abrasive Material Silicon Carbide, Grit 320, Compatible Tool Type CNC Machine, Drill, Drill Press, Operating Speed - Maximum 1,000 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter - Minimum 18 mm, End Marking Color Red, Grade Extra Fine, Stem Marking Color Yellow.