The RAM-B-132RU consists of a zinc-coated U-bolt base, medium length double socket arm, and the RAM® Level Cup™ self-leveling drink holder with koozie. Included in this kit is U-bolt hardware that will accommodate rails from 0.5" to 1.25" in diameter and black cover caps to be placed over the exposed ends of the U-bolt. The gyroscopic RAM® Level Cup™ has two pivot points so your drink always stays upright and never spills. The integrated eyelet and hook provide an optional tethering function, allowing you to secure any small or open container in demanding environments. Compatible with cups, cans, bottles, and mugs ranging from 2.5” to 3.5” in diameter.