"The Scotty Kayak/SUP Transducer Arm Mount for Post Mount holds your transducer firmly in place so you can focus on angling or recreation instead of worrying about your transducer. Made of high-strength composite material for years of sturdy service, the Scotty Kayak/SUP Transducer Arm Mount for Post Mounts boasts strong corrosion resistance. This Scotty transducer mount telescopes from a mere 11-1/2"" to 18"" and swivels 360. This kayak transducer mount includes the No. 438 Gear-Head Track Adapter and convenient Slide Track.Manufacturer model #: 141. Mounts a transducer on any smaller boat or vessel High-strength composite construction Corrosion-resistant Provides secure transducer attachment Allows micro adjustments for perfect positioning Telescopes 11-1/2""-18"" Swivels 360 Includes No. 438 Gear-Head Track Adapter and Slide Track"