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RAM-109HS-4U Features:

• Warranty: Manufacturer's, RAM Mounts (National Products Inc.), Limited Life Time Warranty.
• Base Plate Included: RAM-109H-B shown below is a marine grade aluminum horizontal base with 4 pre-drilled mounting holes. The connection between the swing and the base is a bolt pivot point. Mounting hardware is NOT included.
  

• Arm Description: RAM-VB-110-5U single swing arm mount consists of a 6 inch long straight swing arm mounted on a horizontal surface mounting base. At the free end of the swing arm mount is a open 1.5 inch diameter socket. The open socket end will accept any mounting plate with a RAM 1.5 inch diameter ball. This allows a versatile RAM ball and socket system.
• RAM-109HS-4U Description: Consisting of a single swing arm mount with 1.5 inch socket, 6 inch long straight swing arm that is mounted on a horizontal surface base. The connection between the swing arm and the base is a bolt pivot point. The bolt pivoting point allows a complete 360 degree rotation and the ball and socket system allows a 180 degree vertical pivot with a 360 degree rotation.