for durability and safety.?2. Product SpecificationType of productGrinding wheelCertificationSGS En12413 MPAWheel Diameter100mmSize4inchThickness6mmBore Diameter16mmColourGreenAbrasivesWA PA SA ZABackingFiber glassBondReinforced ResinItem weight22Kg/cartonQuantity200pcs/cartonMax speed70m/sSub TypeFor metl?3. Product Feather?Sharp s your daily output? How long is?delivery?time?-200000 pcs per day for daily products output. Normally 10-15 days for 1 container?after?order confirmed.Can you