Unicel Pg-1904 Replacement Filter Grid for American, Pac-fab, Hayward, Jandy, Astral, Waterway Diameter: not available; length: 24-inch; width: 9 3/4-inch Top end cap: not available, 0-inch inner diameter; bottom end cap: not available, 0-inch inner diameter Pleat count: not available; filter media: not available; filter area: 48 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications