Unicel C-4402 Replacement Filter Cartridge for 20 Square Foot Aqua Spa safety-knives Chemistry Kit

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Unicel C-4402 Replacement Filter Cartridge for 20 Square Foot Aqua Spa safety-knives Chemistry KitUnicel C 4402 Replacement Filter Cartridge for 20 Square Foot Aqua Spa Diameter: 4 5 8 inch; length: 9 3 4 inch Top end cap: molded cone handle, 0 inch inner diameter; bottom end cap: open with slots, 1 7 8 inch inner diameter Pleat count: 138; filter media: 4 ounce reemay 2040; filter area: 20 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications