Purdy 140665093 Pro-Extra Colossus Roller Cover, 9 inch x 1/2 inch nap Woven Polyamide Made in US Roller covers provide a smooth rolling, even release and beautiful, uniform coverage every time Made of an exclusive formulation of 100% polyamide, colossus roller covers lay paint off very smoothly and carry a remarkable amount of material to the surface without dripping or splattering Large core diameter 1-3/4 inch version of Purdy colossus roller covers hold 25-35% more paint  increases production