Features. Unicel filters are made of Reemay media. Made with spun bonded, 100 percent polyester material. This Unicel C9419 Filter is durable effective in capturing the smallest of debris. Maintain sparkling clean beautifully clear water with the Unicel Replacement FilterSpecifications. Unicel Series 9000. Outside Diameter 105/16. Length 235/16. Media 4 ounce. Capacity 150 sq. ft.