The ArroWorthy Tradesman Plastic 4 in. W X 9 in. L Disposable Trim Roller and Tray Set are a great value offering the best price to performance ratio. Perfect for use on walls, ceilings, trim, marine coatings, fiberglass and epoxy coatings. To minimize fiber shedding, wrap a new roller cover with masking tape and peel it off to remove loose fibers.