Taper Cup Grinding Wheel, Size: 152.4/120 X 50.8 X 22.23 Mm ( R-25, B- 20Mm) Grade A-16 3, R-2, Bm-4, Conforming To Is:2324-1985.Make Carborundum Universal Limited (Cumi) Or Grindwell Norton Limited Only. [ Warranty Period: 30 Months After The Date Of Delivery ] ]