Flexible options for homeowners with attractive design of the enclosures and smooth, radius-formed end covers that blend with the unit's sleek, flowing lines;System components that provide structural strength, complete rigidity, and freedom from warping;Exclusive Silent Glide Shoe that lets heating elements expand and contract smoothly for silent operation;Heavy gauge brackets snap into place (no sheet metal screws required);Telescoping fill-in sections eliminate cutting and waste;Flared tube at one means no couplings are needed;"Open Box" fin design prevents fin edges from contacting one another;Boxed and serrated aluminum fins increase radiating surface while directing and increasing convection;Baseboards are in 8', 7', 6', 5', 4', 3', and 2' lengths, packaged to customer needs; Splice plates are provided with 8', 6', and 5' lengths;Telescoping sections come in 14' lengths