FCB6C-4WN03 Exterior die-cast aluminum, 6″ nominal diameter bollard with a 4-way, 3″ high window opening. The FCB6C-4WN03 6″ bollards are Marine grade, corrosion resistant, heavy walled, high pressure die-cast aluminum. Tubular housing is extruded aluminum. Impact resistant, UV stabilized, white, polycarbonate diffuser. 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 3/8″ diameter hot dipped anchor bolts. Heavy gauge base bracketing for bollard installation. Standard polyester powder coat finishes include black, bronze, silver and white with custom or RAL colors also available.