Pool Filter Replaces Unicel C-8380, Filbur FC-2810 Filter Cartridge for Swimming Pool and Spa Replaces unicel c-8380 Replaces filbur fc-2810 High quality filter material Pre-Filters allow for quicker water balancing with fewer chemicals. Washing a filter will extend its life &amp; clean filters use less energy. The Jet Brush makes this quick and easy. Scum Magnets prevent scum andoil from making it to the filter for fewercleanings.