Brand new, never used, in the original packaging.
The Seaview Hinge adapter is the ideal solution for someone who needs extra height clearance when storing their boat.  This allows the user to have their Seaview (or other) mount hinge backwards.  
Available for Seaview (or other radar) mounts with a base dimension of 7" x 7", 8" x 8", and 10" x 10".  
The modular design allows the user to not have to replace the entire mount when a different radar or satdome is used. 
Instead, the user can just replace the top plate.
Simple and easy solution to lower the height of your radar mount.  
The hinge adapter can hinge backwards 180 degrees, allowing you the most clearance possible.
With the captive knobs, you do not need tools, and these knobs will stay with the hinge when it's open or closed.

Retails for $475.