White epoxy-polyester powdercoat.22-gauge steel casing able to support 165 lb at its center.Full-length thermal protection with automatic reset.Cabinet designed to ensure optimal hot air distribution.Full-length wireway.Single tubular, stainless steel sheathed element with boxed aluminum fins for improved heat dissipation; The element is securely fastened at its center, floating in nylon sleeves at each end, eliminating expansion and contraction noises.Built-in thermostat installed in the left or right junction box (optional).Single pole electronic thermostat installed in the left or right junction box (optional).Wall thermostat (not included) - the use of an electronic thermostat is strongly recommended.Low voltage relay kit installed in the left junction box only (optional).Surface mounted.Knockouts for the BX and clamps for the NMD cables located at each end.Mounting holes spaced at 1-in intervals along the top and the bottom of the unit.