Feature●Navigation Lights should be mounted so, that they are not covered by the vessels superstructure or may interfere with deck Lights●Also works as a flag pole●Does not include screw fastened Scotty holder●(17. 3-Inch - 39-Inch) SizeDescription Designed for the Navilight 360 deg; / 001, Navilight Tricolor / 305, Navilight 360 deg; Rescue / 010 - Secure adjustable clamp - Save mounting on 25/32 mm (1"/1 frac14; ") rails - Rotates through 180 degrees