2 Pieces Spa Filter Cartridge for Pleatco PWW50 Hot Tub Filters, Replacement for Unicel C6CH-940, Jacuzzi Spa Business Whirlpool, and Swimming Pool Systems. Made from 100% polyester fiber material for enhanced dirt and debris capture. Designed to fit most indoor and outdoor above-ground pools, hot tubs, and spas. Product Size: Diameter: 150 mm (5.9 in), Height: 241 mm (9.5 in), Thread Size: 46.5 mm (1.8 in). Features a collapsible design that increases filter surface area, reduces pressure differential, supports higher flow rates, and extends service life. Reusable and easy to clean, helping to reduce maintenance costs over time. Ideal for maintaining optimal water quality in spa and pool filtration systems. Ensures efficient removal of contaminants to keep water clean and clear. Simply install into your existing system for reliable performance.