The Wooster RR381 Pro/Doo-Z FTP Jumbo-Koter roller covers measure 6-1/2 inches wide with a 3/8-inch nap and are designed for smooth to semi-smooth surfaces where a professional finish is required. The high-density woven Pro/Doo-Z fabric resists shedding and matting while delivering excellent paint pickup and controlled release. These mini roller covers help reduce lint and roller marks while providing consistent coverage on trim, cabinets, doors, and small wall areas. Compatible with Jumbo-Koter mini roller frames, this convenient 2-pack provides reliable replacements for detailed painting projects.