Feature:Paint-saving 4mm wool brush head.The hot melt process makes it resistant to thinner, solvent-based paints.No after painting, suitable for smooth base surface painting. With one end closed design, you can brush the corners and prevent paint from leaking.Perfect replacement cover for paint rollers to paint trim, doors, edging and line striping on small areas. NOTE:Keep your roller cover in good condition by removing frame after use and washing off any paint residue.Be sure to not overload the roller with paint for better result, always maintain a wet edge, do not overwork the paint with your brush and roller. Specification:Color: WhiteMaterial: WoolNap Length: 4mm / 0.15 inchTotal Dimension: 54x25x7mm / 2x1x0.27 inch (L*OD*ID) Package Content:12 x Roller Covers.