white grinding wheels

I have been looking at the you tube videos that mike waldt have and in one he uses a white 40 mm wide wheel 80 grid for sharpening,,and he said he purchased it from record power which is in the uk,,I take it the wheel is about an 1 1/2 wide,,i have been looking for one sold here that wide in the us but have turned up no results,,,as a new woodturner I would appreciate any comments

(b9)

white grinding wheels