The Wooster Pro/Doo-Z FTP 1/2 Nap 9-Inch Roller Cover measures 9 inches in length, with a 1/2-inch nap height and a standard 1.5-inch core diameter for compatibility with most roller frames. This high-performance, shed-resistant cover features proprietary high-density woven fabric and HydroFlow technology for consistent paint release, reduced matting, and minimal rework, making it ideal for semi-rough surfaces like walls, ceilings, and wood. It excels with all modern paints, including flats, eggshells, satins, semigloss, glosses, enamels, primers, urethanes, and epoxies, delivering a lint-free, professional finish.