●This Bimini Top Jaw Slide is suitable for 7/8 inch O.D. round tubes ●Total Length: 2-1/4 inch (57mm). I.D.: 7/8 inch ●Pin Diameter: 1/4 inch ●Constructed of Black Nylon. Designed to be installed on Pontoon, Fishing, and Ski Boats ●FIVE OCEANS, 40 Years Developing High-Quality Marine & Outdoor Products