Using high elastic and strengthened Rubber & Plastic material mixed with Alumine and Silicon Carbide to be of Commixed Reaction, BK polishing wheel has its frame on high elasticity, wearing resistance, and polishing efficiency which make BK polishing wheel fully but gently contacted with glass edge to avoid the problem of burning glass or causing chips/breakage because of the unevenness of glass edge or the vibration of machine, to require less pressure, and to get best performance of lines/marks removal. It's mostly applied on straight line edge grinding machine and double edge grinding machine. Regular dimension: 150*40*70 130*35*60 Common grit: 46#, 60#, 80#