Perko 1330DP4CHR 36 All-Round Pole Light

USCG certified for use on power driven vessels under 20 meters (65.6 ft.) in length. 2-mile visibility. Black plastic top, chrome plated zinc alloy base 3/4 inch diameter anodized tube with locking collar, and 16 degree rake. Gold plated contacts. Screw size is 8. 2-Pin mounting base and 12V bulb included. Base: 3-3/4 inch x 1-5/8 inch.