Flexible Cylinder Hone, Compatible Bore Diameter – Maximum 5 1/2 mm, Compatible Firearm Caliber Not Applicable, Stem Diameter 0.08 in, Abrasive Length 1 1/2 in, Overall Length 8 in, Abrasive Material Silicon Carbide, Grit 80, Compatible Tool Type Brake Cylinder, Wheel Cylinder, Operating Speed – Maximum 1,200 RPM, Primary Material Application Stainless Steel, Compatible Bore Diameter – Minimum 5 1/2 mm, End Marking Color Orange, Stem Marking Color Not Applicable