Hayward C1200 120 sq. ft. Cartridge Pool Filter. Hayward"s Star-Clear Plus filters offer added quality, value and convenience in cartridge filtration. With filter tanks constructed of new high-strength PermaGlass XL material, Star-Clear Plus filters are the ideal choice for the most demanding applications and environmental conditions. Plus, with a larger filtration element, Star-Clear Plus filters have greater effective filtration area than similar sized and priced cartridge filters.