Wooster Brush MR502-9 Flawless Roller Cover 3/16 Inch Pile, 9 Inch Shed-resistant white non-bubbling fabric delivers even coverage and a flawless finish with virtually no lint For topside finishes marine varnish polyurethanes primers paints epoxies nonskid coatings fiberglass resin and antifouling bottom paints Green double-thick polypropylene core resists water solvents and cracking