Comparison : Item # 421-53358, 1/4" x 18" Zirconia AO "Y" Weight Belt 40 Grit Wide Belt
Item # 421-53359, 1/4" x 18" Zirconia AO "Y" Weight Belt 60 Grit Wide Belt
Item # 421-53360, 1/4" x 18" Zirconia AO "Y" Weight Belt 80 Grit Wide Belt
Item # 421-61008, 1/4" x 18" Aluminum Oxide "X" Weight Belt 24 Grit Narrow Belt
Item # 421-61009, 1/4" x 18" Aluminum Oxide "X" Weight Belt 36 Grit Narrow Belt