The **Unicel** 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. *Unicel* filters are made in the USA for the highest possible quality, allowing you to buy with confidence.**Note: Replaces any 6” or 7” OD cartridge that has an MPT fitting or a 1.9” id w/ disposable adapter.**Top quality, dependable and durable; these are a few of the reasons why Unicel leads the industry in swimming pool filter replacement cartridges. Unicel filters use a unique, synthetic fiber filter media specially designed for the pool and spa industry, creating exceptional dirt catching ability. Easy to clean and easy to replace make Unicel brand filters a great option for your pool or spa.