attwood All-Round Fold-Down Light with Cam-Lock Adjustment, Anti-Glare, 20-Inch 20 inches Aluminum pole Vertical and horizontal mounts Two-mile, 360 degree visibility Boats up to 39.4 feet (12 meter) Aluminum pole Includes both vertical and horizontal mounts Fold down base allows light to swing 180 degrees Designs eliminate materials (including die-cast) that can tarnish or corrode. Materials are non-corrosive, including bases of glass-filled polymer and poles of highly anodized aluminum or sturdy black plastic.