Material: Brown corundum Multi use: For polishing of stainless steel copper aluminum and other metal and glass furniture ceramics and more. Application: for the polishing/grinding of metals ceramics marble polished wood crafts etc Good sand effect high temperature resistance and good wear resistance. Good quality: Good quality material allowing good sand grain effect anti-high temperature good wear resistance. Size : Rod length 8.5cm/8*2cm/7.6*1.9cm/7.4*1.4cm/7.6*1.4cm/grinding diameter wheel is about 7.5cm Notes: 1. Please allowed 1-3mm differences due to manual measurement thank you! 2. Due to the difference between different monitors please understand that the picture may not reflect the actual color of the item. Package list: 3 * polishing wheel/ 1 set of connecting rods