1. diameter:4inch (100mm) 2. For marble and granite antiquing. 3. For use with Hand Polisher,Floor Grinder,etc. 4inch (100mm) Round Abrasive Nylon Antique Finish Brush Description: Diameter: 4''(100mm)Thread: M14 or 5/8-11threadFor antiquing finish on the marble and granite slab. For use with such machine as Hand Polisher,Floor Grinder.Made of High quality Silicon Carbide Filament .Grain size:36 ...