1.Name:Ceramic dish grinding wheel 2.Material:White Alumin 3:Size:700x100x305 3.Grain:36#,46#,60#,.... 4..Certificate:ISO900 the wheels do not burn workpieceds in dry condition and no cracks appear. DiameterThicknessHole2201740220209022518402752040.....25401100100305........ We also can be supplied in required material,size and type. White Aluminum Oxide grinding wheel