Marine grade die-cast aluminum. Integral heat sinks. Housing flange interlocks and wraps around lens base producing maximum moisture deflection and resistance to prying. Housing provided with four standoff mounting holes, one 3/4" NPT tapped hole on back of housing, four 3/4" NPT tapped and plugged holes on sides of housing see Cross Section/Details. Standard black, bronze or white exterior TGIC polyester powder coat 5-step pre-treatment. See Ordering Information for optional finishes.