Clamp-On Rail MountDesigned to allow secure mounting of the Navi lights with magnetic base to the bow pulpit or stern rail.Examples of Usage:The Clamp-on Rail mount easily attaches to the bow pulpit and can safely hold for example the Navi light TriColor. In a nearly center position it may be used in its BiColor mode, otherwise it is recommended to use two Clamp-on Rail mounts, each equipped with a Navi light TriColor showing the green and red light individually.Mounted to the Stern rail it may hold the Navi lights TriColor, or the Navi light 360°/Navi light Rescue to show the Sternlight.The Clamp-on Rail mount may also be used on vertical poles - together with the Navi light 360°/ Navi light Rescue it is the perfect solution for the Masthead light.Specifications:Save mounting of Navi lights with magnetic base (Navi light 360° 2NM, Navi light TriColor 2NM, Navi light Red/Green, Navi light 360° Rescue).Fits on rails from 25 to 32mm (7/8" to 1-1/4")Rotates through 180°Size: L = 97mm, W = 50mm, Diameter = 55mmWeight: 80gWARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.