Ideal for motorcycle handlebars, the RAM® Handlebar U-Bolt Base consists of a 25.4mm B size rubber ball attached to a zinc-coated metal U-bolt base. Designed to sit at right angles to the mounting rail, the zinc-coated metal U-bolt base accommodates rails from 12.7mm – 31.75mm in diameter. Included are black cover caps to be placed over the exposed ends of the U-bolt as well as a composite adapter that can narrow the rail to a minimum width of 12.7mm. This rail mount is compatible with any B size RAM® Mounts component; ball and socket technology allows for near-infinite adjustability. This rail mount is made of powder-coated, marine-grade aluminium for durability and reliability in the most demanding environments.