New and high quality Size: 4mm/4.8mm/5.5mm/6mm (Optional) Shape: cylindrical Diameter: 4mm (suitable for chainsaw small 8 chains) 4.8mm (suitable for small chain saw 325, large 8 chain) 5.5mm (suitable for large chain saw 404 chain) Shank diameter: 3mm Material: Chrome alumina Suitable for: electric grinder, lithium electric grinder Mesh number: about 120-150 mesh Package Included:10pcs Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.