RAM® Double Ball Mount with Metal Knob - C Size Short Apex 13 5" diameter round base and

5" diameter round base and Rugged Handi-Case™

This kit consists of one (1) double socket C size medium arm

One of those round plates has a 1/4"-20 male threaded post in the center

This mount is designed to be used with any of the RAM mounting bases or cradles with a 1

The RAM-101U-271-12 consists of a double socket arm

RAM® Double Ball Mount with Metal Knob - C Size Short Apex 13 5" diameter round base andThe RAM 101MU B consists of a 3 inch double socket arm with metal knob and two 2. 5" diameter round bases with the universal AMPS hole pattern. Designed into the mount is a 1. 5" diameter patented rubber ball and socket system with adjustment points at both socket ends of the arm. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your device is safe, secure, and within