The Tolsen 40070 is a roller cover refill designed for painting outside walls and other coarse or textured surfaces. It features a 225mm (9") width and an 11mm fiber height, which allows it to reach deep into the uneven surfaces of a facade. The cover is made from a polyester and acrylic blend, which provides the necessary durability for rougher materials. This refill is built for fast change, making it easy to switch covers quickly during a long painting project, which is helpful for those who need to maintain a steady workflow on larger exterior areas.