Comparison : Item # 40JA15, No. 40 - 1/2" Pitch - QD Sprockets
Item # 40JA16, No. 40 - 1/2" Pitch - QD Sprockets
Item # 40JA17, No. 40 - 1/2" Pitch - QD Sprockets
Item # 40JA18, No. 40 - 1/2" Pitch - QD Sprockets
Item # 40JA19, No. 40 - 1/2" Pitch - QD Sprockets