Up-Grade kit for earlier Eheim Aquaball Internal Filters Adds another filter cartridge to any of the 2206, 2208, 2210, & 2212 filters Comprises a filter basket, filter foam cartridge, and filter box with filter pad Increases filter volume by 140 - 180 cm3Please Note : This item does not fit the New Aquaball 60, 130 or 180 See Eheim 4024000 for these models