Replacement model. Length: 21 cm, outer diameter: 15 cm, top: round handle, bottom: 3 cm SAA thread, filtration area: 45 square meters. Powerful filtration performance: Due to the innovative "dirt collection" technology, the fabric absorbs more impurities than ordinary fabrics. Long service life: The unique structure of the trilobal filter fabric makes it easier to capture and remove stains. You can easily clean the filter after use. Sturdy: The entire filter is made of an unavailable handle, the core and the thick high-speed ABS filter cloth, form a solid and durable body. Compatible Models: Pleatco PWW50, Unicel 6CH-940, Filbur FC-0359, Waterways 817-0050 4 AIso can be used in the following SPAs: Aber Hot Tub, American Spa, Apollo Spa, Arcadia Spa, Belize Spa, Blue Pacific Spa, Canspa Made, Catalina Spas, Charisma Spas, Clearwater Spas, Dakota Spas, Dynasty Spas, Freestyle Spa, H2O Spa, Haven Spas, Hawkeye Spas, Infinity Spas, Infinity Spas. Tennessee, Island and Spas, Made in