The Hobie Thru Hull Wiring Kit allows you to thread wires through the hull of your boat to install fishfinders, GPS and more. The kit includes two through hull fittings with a variety of options for different wire sizes, backing nuts, o-rings, and installation instructions. Also includes two solid grommets to block off the opening if you want to remove your electronic device.
These things work great no issues
Also a 5 star review, very good kit and worked very well for my Lowrance Elite 4 DSI install on my Mirage Oasis tandem. You get 2 kits with this and there are lots of grommet combos and even 1 that seals off completely if you remove something you had installed. You must a drill a 1" hole into the yak and the nut on back side is 1.25" across so chose a spot that has this clearance. And chose a spot you can actually reach the back side of easily. Its expensive for what it is but will seal much better than a split grommet and looks like original equipment on the yak. I put it on a vertical wall so I dont get water sitting on it, its about 90% water proof.