This is the base to the Pepwave antenna marine mount. This mount is specially designed for deck and mast installations on boats and other mobile vehicles. The cable from the antenna is fed through the mount and sleeve directly for production and then routed through the surface the antenna is mounted on.
If using with a Puma antenna you need ACW-651 and ACW-652. If you using with an HD Dome you also need to add ACW-650.