Wooster Brush R239-18 18" Super/Fab Roller Cover With 3/8" Nap Wooster Brush R239-18 18" Super/Fab Roller Cover With 3/8" Nap Features: Roller cover Provides exceptional capacity with all flat or satin paints, stains and waterproofing Resists matting for complete coverage and smoother results Green double thick polypropylene core resists water solvents and cracking Withstands prolonged soaking Golden Yellow fabric 3/8" nap 18"