The Purdy Marathon 9” roller sleeve is suitable for use with water based and oil based paints for interior and exterior applications. The Marathon series is Purdy’s most durable roller cover and has excellent paint pick-up and release properties for increased productivity. It is made with an exclusive blend of nylon and polyester. Designed to withstand wear and tear. Provides a smooth finish and even coverage, even after 40 hours of continual use. Doesnt leave traces of lint. Suitable for all latex and oil based paints. For flat, eggshell and satin finishes. Specifications: Size: 228mm (9in) Pile Height: 19mm (3/4in) Core: 44mm (1.3/4in) Material: Nylon/Polyester knitted cover.