Wooster Brush R291-9 Lambswool 100 Roller Cover, 1/2-Inch Nap, 9-Inch Buff-colored 100% natural lambs wool is knitted into a synthetic backing for consistent quality Quickly applies stains waterproofing and all flat or satin paints including latex Green double-thick polypropylene core resists water solvents and cracking For semi-rough surfaces