Grinding wheel T27 depressed center wheels 4" x 1/4" x 5/8" (100 x 6 x 16mm), 4 -1/2" x 1/4" x 7/8" (115 x 6 x 22mm), 5" x 1/4" x 7/8" (125 x 6 x 22mm), 6" x 1/4" x 7/8" (150 x 6 x 22mm), 7" x 1/4" x 7/8" (180 x 6 x 22mm), 9" x 1/4" x 7/8" (230 x 6 x 22mm), T42 depressed center wheels 4" x 1/8" x 5/8" (100 x 3 x 16mm), 4 -1/2" x 1/8" x 7/8" (115 x 3x 22mm), 5" x 1/8" x 7/8" (125 x 3 x 22mm), 6" x 1/8" x 7/8" (150 x 3x 22 mm), 7" x 1/8" x 7/8" (180 x 3 x 22mm), 9" x 1/8" x 7/8" (230 x 3 x 22mm), Materials: a for metal, wa /a for steel, wa for stainless steel, c and gc for glass and ston By cartons