2 Pieces Spa Filter Cartridge for Pleatco PWW50 Hot Tub Filters, Replacement for Unicel C6CH-940 and Jacuzzi Spa Business Whirlpool Systems 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: Filter Diameter: 150 mm (5.9 in), Height: 241 mm (9.5 in), Thread Size: 46.5 mm (1.8 in) Product Features: Collapsible design increases filter surface area, reduces pressure difference, supports higher flow rates, and extends service life. Reusable and easy to clean, helping reduce maintenance costs Product Compatibility: Compatible with most indoor, outdoor, and above-ground pools, as well as indoor and outdoor hot tubs and spas Functionality: These pool filters help maintain clean and healthy water by capturing dirt and debris. Ideal for keeping spa systems operating efficiently. Simply install into your system to begin filtering contaminants from the water