Scotty #141 Kayak/SUP Transducer Mounting Arm with Gear-Head Designed for kayak and SUP anglers needing an easy way to install transducers for Transport as well as other Scotty accessories Includes the 438 gear-head track Adapter which works in conjunction with our Scotty slide track and enables attachment of our Scotty universal sounder mount if desired Ability to instantly drop and lock a Fishfinder Mount or any other Scotty post-mount accessory on top of the 141 Universal sounder mount, Scotty slide track and other accessories sold separately Made of high strength composite material; swivels 360 degrees; mount telescopes from a compact 11.5 inches to 18 inches when fully extended