Turn any 30 degree flush mount rod holder into a mounting opportunity for a gimbal mounted item! Use this gimbal mount to attach any of our seat base caddy systems to use with your existing flush mount 30 degree rod holders! You can also use this mount to attach down-riggers and many other fishing accessories. 1.5'' diameter tube. 12'' long. Shipped with installation hardware to pair with any of our seat base caddy systems. Images show this mount attached to our 4 Caddy Standard unit. Caddy and accessories not included.