Product Name: Aluminum Based Diamond Grinding Cup Wheel Quantity: 1pc Specification: Diameter 4"/100mm; Segment height 7mm; M14 or 5/8-11 thread; Grit #30,#50, #100 Diameter 5"/125mm; Segment height 7mm; M14 or 5/8-11 thread; Grit #30,#50, #100 Feature: 1. For Granite, marble, concrete, brock ..... 2. #30 for first step coarse grinding, #50 for the medium next step, #100 for fine grinding 3. Grit #100 diamond grits provide great finishing and much longer working life 4. Aluminum base provide light weight and lower noise 5. The holes can reduce weight and easy to suck the dust 6. Hot-Pressed segments, efficient and smooth grinding ================THE END================