SCOTTY 140 TRANSDUCER ARM. Kayak/SUP Transducer Mounting Arm- made of high strength composite material that will give you years of service without corrosion. Designed for Kayaks and small boat use Transducer Arm Telescopes from a compact 11.5" to 18" when fully extended and swivels 360 degrees Fully Adjustable Design Includes the no# 241 Locking side/deck mount Scotty Post 360 degree swivel