humminbird transducer pole mount

587CI, 595C, 596C, 597CI, 717, 718, 727, 728, 737, 747c, 757c, 200/83 kHz. 9 20 767, 768, 777, 777c2, 787, 778C, 787c2, 787c2I, 788C, 788 ci hd, 858c, 859ci, Down Imaging/DualBeam Plus, 75/45, 455/800 kHz // -->