Bankers bronze with stainless steel heating element and aluminum fins. Powder coated 22 ga. steel front with 20 ga. junction boxes located on each end of the heater - junction boxes contain quick connect cable clamps and 6 in. ground lead wires. Standard inlet and outlet wire guards. Over-temperature thermal limit extends entire heated length of unit. A full length wireway and cover provided along the back of the heater. Heater can be mounted to the wall by using the key hole knockouts every 4 in. at the back of the heater. Optional In-Built thermostats installed in the junction box.