HRvS8 DBS Satellite 8-way signal splitter
This signal splitter by Holland Electronics uses diode protected circuitry to prevent DC back-feeding.
It is rather small and can be mounted vertically or horizontally. It's body measures 2.75 x 2.75 x 5/8" with ½" long threaded female coax connectors. It also has a screw for a ground wire and 2 mounting holes.