25 Foot roll of 3/16 Inch (.180") Vinyl Spline. <br> - This is used to repair outdoor patio sling furniture and also used for awnings spline or slide out covers on RVs.<br> - The spline is designed to fit into the seam of fabric and then slid into a rail on a chair frame or awning frame. <br> - Our vinyl solid spline is extruded for outdoor use, it is commercial quality 100% virgin solid vinyl with ultra violet inhibitors manufactured into the product.