Introducing the Lund Boat Fishing Rod Holder, made of durable black marine-grade plastic with a matte finish. This rod holder measures approximately 2 3/4 inches in outer diameter (at the end with the mounting base) and 8 3/4 inches in length overall. It features a base mount measuring about 4 1/8 inches in length and 2 3/4 inches in width. The top has a 2-inch inner diameter (ID) hole, and there are (3) approximate 1/8-inch diameter countersunk mounting holes spaced 1 7/8 inches apart center to center.