Comparison : Item # WH-124HA8, Sprocket Number WH-124H
Item # WH-124HA9, Sprocket Number WH-124H
Item # WH-124HA10, Sprocket Number WH-124H
Item # WH-124HA11, Sprocket Number WH-124H
Item # WH-124HA12, Sprocket Number WH-124H