- For your convenient work on ogee and    bowl part, Convex Pad is designed. Do    your work easy.. - Special design for ogee and bowl part    polishing. - Easy and convenient usage.   Outer diameter Specifications Remarks Inner Grit 3"(75mm) 17.0 #50, #100, #200, #400, #800, #1500, #3000, DF(Black or White)   4"(100mm)