Plastic thru-hull transducers are an economical alternative to bronze and work with thinner hulls such as aluminum. Internal steel sleeve provides extra reinforcement. Not for Trailered boats. Professional installation recommended. 30 ft cable and hardware included. This model will work with 917c, 931c DF, 937c DF, 937 DF2, 957c.
Amazon Price: $215.91 (as of May 27, 2018 10:46 am -