The RAM-B-132R-2U consists of a steel strap base, zinc coated u-bolt base, double socket arm, 2.54cm (1") diameter balland a RAM Level Cup Self-Leveling Drink Holder with RAM can insulator. Designed for a clean installation, the RAM strap base will accommodate roll bars from 3.99cm (1.57") to 7.98cm (3.14") in diameter, letting you keep your favorite beverage within reach. Safely concealing the strap clamp in a compact housing, you won't have to worry about exposed sharp edges or unwanted loosening.The stainless steel u-bolt base Accommodates rails from 1.27cm (0.5") to 2.54cm (1") in diameter and includes black cover caps to be placed over the exposed ends of the u-bolt. The RAM B size 2.54cm (1") diameter patented rubber ball and socket system has adjustment points at both ends of the double socket arm. Wth a twist of the arm knob, you can move the Self Leveling Cup Holder mount to your optimum position. Take a corner as hard as you like, this holder is ready to ride. The integrated eyelet and hook provide an optional tethering function, securing any small or open container in any harsh environment. Compatible with any cups, cans, bottles or mugs ranging from 2.5 to 3.5 diameter.