The AlumaDucer™ is the world’s only depth finder / fish finder transducer designed to transmit through Aluminum with ZERO signal loss. The revolutionary new AlumaDucer™ is built using a universal transducer connector. Along with the proper adaptor, you can fit it to almost any 200 kHz, 80/200 kHz or 50/200 kHz sonar. For the first time in boating history, the aluminum boat owner does not need to drill holes in the back of the boat to mount a transducer! Features: - Revolutionary AlumaDucer transducer eliminates need for holes in Aluminum Boats! - Shoots directly thru aluminum hulls up to .150" thick! - Zero signal strength signal loss when installed properly. - Universal connector/adapter design lets you adapt to fit most 200 kHz or 50/200 kHz sonar systems including Lowrance, Eagle, Garmin, Humminbird, Bottom Line, Vexilar, Ray Marine, and Furuno. - Easy access grounding post for eliminating interference. - Comes with Vexilar's special A.C.E. Transducer Adhesive and surface preparation kit. Specifications: - TB0022AU - 83/200 kHz (60 Degree/20 Degree Cone Angles) - All styles have 25 feet of cable