Replace model. Length: 21cm, outer diameter: 15cm, top: round handle, below: 3cm SAA thread, filtration plantration: 45 square meters. Powerful filtration performance: due to technology innovative "dirt-collecting" technology, the fabric absorbs more impurities than ordinary fabrics. Long life: the unique structure of the trilobal filter fabric facilitates the capture and removal of stains. You can easily clean the filter after use. Sturdy: The whole filter is made of an unavailable handle, the core and thick high-speed ABS filter cloth, form a strong 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, H2O spas, Haven spas, Hawkeye spas, Infinity spas, Infinity spas. Tennessee, Island and Spas, Made in