The FCB841 Bollard is Marine grade, corrosion resistant, heavy walled, high pressure die-cast aluminum. Tubular housing is extruded aluminum, 39″ standard. Lens is heat resistant, clear, tempered glass. Neoprene continuous closed cell gasket to seal out contaminants. Captive and recessed stainless steel, tamper resistant hex socket screws. A thick die-cast base plate is provided and anchored through with a set of four 12″ length x 5/16″ diameter hot dipped anchor bolts. Heavy gauge base bracketing for bollard installation. UL & cUL listed for wet locations. The Finish goes through a six stage chemical pre-treatment process that includes iron phosphate, to prepare the substrate for a UV stable, super durable standard polyester powder coat. Available Finishes include Black Bronze Silver White or a Custom Color.