If you already have the Utra Heavy Duty pedestal mount from Fish Finder Mounts .com, yet you want more than one base so you can move your screen/pedetal mount to different positions in you boat (e.g. bow or stern), or you wish to move it to another boat altogether - get this!
 
Approximate pedestal base dimensions:  4" x 4" x 1" tall (hexagonal shaped footprint)