Unicel C-7679 Replacement Filter Cartridge for 150 Gpm Pac-fab Diameter: 7 7/8-inch; length: 33 3/8-inch Top end cap: open, 3-1/16-inch inner diameter; bottom end cap: open, 3-1/16-inch inner diameter Pleat count: 148; filter media: 4-ounce reemay 2040; filter area: 150 square feet Get more efficient filtration and better water clarity with Unicel filters. Withstands High Pressures & Temperatures Longer time between cleanings; meets oem specifications