Wooster Brush RR631-9 Wooster Wool Roller Cover 3/8-Inch Nap, 9-Inch Finest-quality 100% natural shearling for all paints including latex alkyds enamels and urethanes Single-piece heart of the pelt construction hand sewn with extra attention to quality Very dense and soft to roll out the fastest most uniform finish Thick professional phenolic core resists water and solvents