The Scotty ball system with Universal mounting plate provides a mounting platform for a variety of accessories. The ball joint design of the Scotty 150 enables a smooth, full range of motion. The corrosion proof construction of this system provides a long service life in both fresh and salt water applications.Specifications:- base mount dimensions: 2 1/4" x 2 1/4"- mount height: stands 6 3/4" tall- - finish: black