Extruded aluminum housing with cast-aluminum base, Impact-resistant clear, acrylic lens, Tamper-proof screws in top of housing for vandal resistance, Seamless aluminum shaft lifts off base for easy access to ballast, Base mounts onto foundation with (3) 1/2" x 12-1/2" anchor bolts, 24", 28", 32", 36" and 42" heights (round or square)