RAM Mount Double 6" Swing Arm with 6.25" x 2" Rectangle Base and Horizontal Mounting Base [RAM-109H-1U]Double 6" Swing Arm with 6. 25" x 2" Rectangle Base and Horizontal Mounting Base The RAM double swing arm mount includes two 6" long BENT swing arms mounted on a horizontal surface mounting base. At the device mounting end of the mount is a rectangular 6. 25 x 2" top base. The pivoting points of the mount allow a complete 360 rotation. Dimensions: Overall length: 16. 69" Overall height: 8. 577" Height from bottom of base to top of knob: 4. 89"