2 Pieces Spa Filter Cartridge for Pleatco PWW50 Hot Tub Filters, Replacement for Unicel C6CH-940, Jacuzzi Spa Business Whirlpool Swimming Pool Filter: Made from 100% polyester fiber material for effective filtration and improved dirt collection. Designed as a replacement filter for swimming pool and spa cleaning systems. Product Size: Diameter: 150 mm (5.9 in), Height: 241 mm (9.5 in), Thread Size: 76.5 mm (1.8 in) Product Features: Features a collapsible design that increases filter surface area, ensuring low pressure drop, high flow rate, and extended service life. Reusable and easy to clean, helping to reduce maintenance costs. Product Compatibility: Compatible with most indoor and outdoor, above-ground pools, hot tubs, and spas. Functionality: These pool filters help maintain optimal water quality by capturing debris and contaminants. Simply install into your spa system to keep water clean and clear for a healthier spa experience.