This clear vinyl seal is installed along the edge of each pane of glass in your jalousie or louvered windows. It is designed to provide an air tight seal where one pane of glass closes against another. In most cases, jalousie windows on travel trailers did not come with this seal, but jalousie windows on homes did have it. Priced per foot. Longer length orders may contain breaks in some cases. No continuous length will be longer than 100 feet.