Suitable for flat and low sheen acrylic, 13mm nap, 3 pack Ideal for use on walls and ceilings. The 230mm Paint Roller Covers from Paint Partner have a 13mm nap and are suitable for use with flat and low sheen acrylic. Made from polyester, they give a smooth, professional looking finish to your wall and ceilings. Available in a convenient 3 pack, these roller covers can be re-used if cleaned and stored properly. Colour Pink, Model Name: 230mm Paint Roller Covers 3 Pack, Model Number: 1667435, Material: Polyester, Handle Included. Reusable, Washable, Recommended Use: Walls and ceilings, Roller Nap 13mm.