Unicel 6sq ft Red Top Cartridge was the first filter cartridge sold under
the Unicel label. The Unicel T-380 Red Top was also the first filter
cartridge to be made using E.I. Dupont's T-380 grade, 4 oz. Reemay.
Developed specifically for the Red Top, T-380 media proved to have such
excellent filtration efficiency and cartridge dirt holding capacity that
virtually every major filter manufacturer serving the swimming pool industry
today has adopted this media. Item # UNIT380