supply of 1 silica carbide grinding wheel size 600x100x250 mm 30 nos. 2 resinoid bonded grinding size 400x63x152 .4mm specn 37c16s3bl4 or 37c16s4bl4 or c163s3b1551 or c163s4b1551 144 nos. 3 grinding wheel size 150x25x15.88 mm specification: 37c16s3bl4 or 37c16s4bl4 or c163s3b1551 or c163s4b1551