The Garmin Down/SideVu through hull transducers come in two versions. One looks left, right, and down in a single transducer (deadrise of 5 degrees or less and does not require a fairing block). The ones I'm installing are a pair. The port side transducer just looks to port, and the right side transducer looks both down and to the right (deadrise angle from 5-25 degrees. The kit I used consisted of the transducer pair, two fairing blocks, 2 anti-rotation bolts, bushings, washers, nuts, pigtail to connect the transducers together, twelve pin transducer cable, and GCV 10 with a power and network cable. In sum all of the hardware you need is supplied. Let's get messy!