Brocraft Transducer Arm Mount with Universal Mounting Plate, Transducer Mounting Arm with Track System. Designed for kayak and SUP anglers needing an easy way to install the fishfinder screen and radar at the same time. Made of High-performance composite materials for durability and reliability in the most demanding marine environments. Mount telescopes from a compact 17 inches to 25 inches when fully extended .Include Kayak Low Profile Track .Quickly move the base along the track,Easy to install / reposition / remove