Unused heavy duty TP Marine antenna mount is ratchet and swivel. Measures 3 and 3/4 in by 2 and 1/4 in at the base. Stands six inches tall in the upper position and approximately four and a half inches high when angled. It's a 1-in pipe thread. Base to base of threads is 5 in and threaded portion measures 7/8 in. 2.1 pounds.