1.Name : depressed center grinding wheel 2. Material : white corundom 3. Certificate : ISO-9001 D*dMax speed Granule degree100*16 15300 r.p.m36#,40#, 60#,80#,100#,120#115*2213300 r.p.m125*2212200 r.p.m150*2211000 r.p.m180*228300 r.p.mThe Dimmension of the flap discflap...