SIZE - 1/8 inch (3mm) shank. 7/8 inch diameter, 1/2 inch thickness ABRASIVE BUFFING POLISHING WHEEL SET – Brown: 80 Grit, Green: 150 Grit, Red: 240 Grit, Black: 300 Grit, 4 Colors, 10 pieces for each color, totally 40 pieces Mainly suitable for removing burrs, rust, dust, and oxide layers. Widely used in micro-electronic equipment, jewelry, and other industries. Can improve the quality of metal and stone materials, and is an important part of the machining process. Efficient polishing tool for metal and non-metallic materials for small area rust removal, deburring, and surface polishing. Color: brown + green + red + black Material: Nylon Brush diameter: 25 mm / 1 inch Length: 46 mm / 1.8 inch Quantity: 40 pieces Package Contents: 10 x Red Abrasive Buffing Wheels 10 x Brown Abrasive Buffing Wheels 10 x Black Abrasive Buffing Wheels 10 x Green Abrasive Buffing Wheels Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. Measurement allowed error is +/- 1-3 cm.