General description The 1 Pack Spa Filters for Unicel 6CH-940, Pleatco PWW50P3, Waterway Front Access Skimmer, and Filbur FC-0359 are designed for powerful filtration performance. Utilizing innovative "dirt collection" technology, these filters absorb more impurities than standard fabrics, ensuring a cleaner spa experience. Technical specifications Length: 21 cm Outer diameter: 15 cm Top: round handle Bottom: 3 cm SAA thread Filtration area: 45 square meters Compatibility and accessories Compatible Models: Pleatco PWW50, Unicel 6CH-940, Filbur FC-0359, Waterways 817-0050 Compatible with various spa brands including 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, Tennessee, Island and Spas, Made in Leisure Bay, Millennium Spa, Phoenix Spa, Rec Warehouse, Santa Barbara Spa, Sun Belt Spa, Premium Spa,