Product: Unicel 4CH-21 Replacement Filter Cartridge for 19 Square Foot Top Load,White
Brand: Unicel
Color: White
Diameter: 4 5/8-inch; length: 8-inch
Top end cap: molded cone handle, 0-inch inner diameter; bottom end cap: 1-1/2-inch male thread/mpt, 0-inch inner diameter
Pleat count: 158; filter media: 3-ounce reemay 2033; filter area: 19 square feet
Get more efficient filtration and better water clarity with Unicel filters
Longer time between cleanings; meets oem specifications

Search query: master spa inner filters for hot tubs
Relevance: Exact