1 National diamond faced grinding wheel, 120 grit, depth of diamond 116, 6 diameter wheel, aluminium backing. Brand new, sell for $200.00. Also have 1 Norton diamaond faced grinding wheel. 120 grit, aluminium backing, 6 diameter, depth of diamond 116. Brand new, sell for $200.00. E-mail or call 310-4160. Type the word devo in the subject line or e-mail will be deleted.