PERKO 1607DP0CHR ALL-AROUND LIGHT TOWER / ARCH MOUNT. Thumbscrew makes for easy adjustment of light position. 360 degree All-Round Navigation Light in the up position for all nighttime boating or while at anchor. A cockpit courtesy light in the down position while at the dock. Forward and out of the way for daytime skiing or boarding. Easy to mount on towers, arches or windshields. Reduced Glare design, black plastic top with clear fluted lens, frosted globe and black plastic base, 3/4 anodized aluminum pole. Plastic adapters for flat, curved or V type mount, contains notch for through base wiring. Certified for use on power driven vessels under 65. 6 feet in length. 6-3/4 from center of mounting screw holes to the center of