Comparison : Item # 121-000-2000, Model FC-200, Single Feeder Cube, 120V
Item # 121-000-2001, Model FC-200-2, Dual Feeder Cube, 120V
Item # 121-000-2002, Model FC-200-3, Triple Feeder Cube, 120V
Item # 121-000-2019, Model FC-200-4, Single Feeder Cube, 120V
Item # 121-000-2020, Model FC-200-5, Single Feeder Cube, 120V