Paint roller covers shed resistant"super doo-z" 4 inches length - polybagged nap size 3/16 inches type surface=s For all paints, enamels and varnishes. Use on drywall, plaster, smooth wood and paneling. Woven, shed resistant white fabric. Dense fibers reduce dripping and spatter. Polypropylene core resists water, solvents, and cracking.