The Swimming Pool Filter is made from heavy duty polyester and is designed to last far longer than cheaper alternatives, while having more pleats to improve filtering capacity. filters are made in the USA for the highest possible quality, allowing you to buy with confidence.This package includes 6 filter cartridges.Note: Replacement for Coleman Spas and Artesian Spas. For use with: Artesian Spas (Original is 7 7/8" OD and 7 5/8" overall length.) Coleman Spas (100520 and 3301 2109) Master Spas (Replacement for 7" or 8" OD Eco Pur filtration systems; must remove black stand pipe for 8" OD.) ...AND MORE Sharp pleat folds maximize spacing between pleats Tough urethane end caps assure durability for the life of the cartridge Outside Diameter: 7" Length: 8" Top End Cap: Semi Circular Handle Bottom End Cap: 2" Male Thread/MPT Pleat Count: 175 Media: 3 oz Description: 32 sq. ft. Top Load Coleman Spas, Artesian Spas