Norton Gemini K225 AO Coated Cloth Rolls Premium P-graded Aluminum Oxide (AO) abrasive for greater rate on general purpose metalworking application. Flexible J-weight backing for superior conformability to complex surfaces and better finishes. 40 to 60 grit are supplied in durable, but flexible X-weight cotton backing. Advanced full resin bond system for exceptional grain adhesion for longer life. Pack of 1