Unicel C-5621 Replacement Filter Cartridge for 22 Square Foot Advanced Spa

Diameter: 5 3/16-inch; length: 11 7/8-inch
Top end cap: closed with string handle, 0-inch inner diameter; bottom end cap: open, 1 15/16-inch inner diameter
Pleat count: 106; filter media: 3-ounce reemay 2033; filter area: 22 square feet
Get more efficient filtration and better water clarity with Unicel filters
Longer time between cleanings; meets oem specifications