Wooster Brush R212-4 1/2 Pipe Painter Twin roller cages spin smoothly and paint two sides of the pipe simultaneously Fully adjustable to paint pipes as small as 1 inch diameter, as well as railings, posts, I-beams, bridges, and more Galvanized 1/4 inch shanks, polypropylene threaded grip, Sherlock GT compatible Works with both 4 1/2 inch and 6 1/2 inch Jumbo-Koter rollers