Perko All-Round Telescoping Pole Lights feature a positive tightening device for height adjustment. Certified with no. 90, 12 volt bulbChrome-plated zinc baseBlack plastic topAnodized aluminum poleFor power vessels under 20 meters (65.6 ft)
The Perko 1311DP3CHR All-Round Telescoping Pole Light - 30" is the by far the most amazing navigation lights i have seen so far. Perko as it should make excelent product and this is one of them.