The link to Garmin GT30-TH Thru-Hull Transducers, Pair has been copied
Get ultra-clear sonar pictures of objects, structures, and fish that pass below and to the side of your boat with this 12-pin thru-hull transducer with stainless steel stem. This transducer with built-in, fast-response temperature sensor has a power rating of 500W per element (1,500W total), a depth of 750' (DownVü) and 500' left and right (SideVü), and an operating frequency of CHIRP 455/800 kHz. For hull deadrises up to 25°. Includes 12-pin port and starboard transducers with stainless steel stems, isolation bushings, fairing blocks, Y-cable, mounting hardware, and installation instructions. Maximum depth of 750'.