4"(100mm)       
3.0mm thick       
Grit:#30,#50,#100,#200,#400      
*Metal pads(copper bond)   
*Much more aggressive and durable than traditional resin bond pads
*This complete set comes with 50, 100, 200 in metal bond, and 400, 800, 1500, 3000 grit and a buff pad in resin bond
*Wet polishing for granite
*RPM:4000-5000