<b>Specifications:</b><br> Bristle Disc Diameter: 25mm(0.98inch).<br> Disc Center Hole: 2mm(0.08inch).<br> Bristle Grades: 2500#<br> Material: Nylon + Aluminum Oxide Grains.<br> Mandrel length: 35mm(1.38inch).<br> Shank Diameter: 3mm(0.12inch).<br> <br> <b>Packaging List:</b><br> 10Pcs Brush + 2Pcs mandrel.<br> <br> <b>Note:</b><br> Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Please don't mind, thank you! Please choose which grit you want.