The Cascade 1200 and 1500 Motor Unit Gasket replaces old, worn out or cracked motor gaskets in the Cascade 1200 (CCF4UL) and 1500 (CCF5UL) aquarium canister filters.
As gaskets get older, pressure and wear-and-tear cause them to lose their snugness. Replace misshapen gaskets to maintain a water-tight fit.
This gasket only works for the Cascade 1200 and 1500 model filters. Other models will require different gaskets.