Canopies and Tarps is your top resource for specialty fitting roof structures. One unique, rare fitting is our 1" three-way thru for such roof structures, made from sturdy, galvanized steel to ensure that you and your most valuable possessions will stay safe and dry. The eyebolts add an extra level of stability, allowing you to fasten tent poles snugly, making your structure the best defense for inclement weather conditions. The fitting's inside diameter measures 1 ¼.