The RAM-B-180-A-231Z-2NUBU consists of a steel strap base, u-bolt bases, short double socket arm and 1″ diameter ball base with 9mm hole. Designed for a clean installation, the RAM strap mount will accommodate most common rollbar sizes on UTV’s, allowing for the placement of the RAM rubber ball base. This mount can also be attached to smaller diameter handlebars on ATV’s using the included hardware. The mount is designed with a RAM 1″ diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. Compatible Rail Dimensions: Mount with Strap: 1.57″ to a maximum of 3.15″ Mount with U-Bolt: 0.50″ to a maximum of 1.25″ Material: Powder Coated Marine Grade AluminumBall Size: 1″ Rubber Ball „B” Size Note: The „U” in the part number reflects product packaged in poly bag.