Perko white all-round pole light for boats up to 20 meters provides USCG certified 2 mile visibility. Light features chrome plated brass top and base, clear fresnel globe, 3/4" diameter anodized tube with locking collar, waterproof cap and retainer, 16 degree rake, and gold plated contacts. 12V bulb included. Screw size is #8. (Screws not included.)