The link to Garmin GT41-THP Thru-Hull Transducers, Pair has been copied
Perfect for the coastal and offshore fishermen who want traditional sonar, CHIRP ClearVü, and CHIRP SideVü scanning sonar with stainless steel stems, this pair of 12-pin thru-hull mounted transducers consistently displays fish arches as well as clear pictures of objects, structures, and fish that pass below and to each side of your boat. The CHIRP ClearVü/SideVü elements have a power rating of 500W per element (1,500W total) and operating frequencies of 260/455 kHz. The traditional sonar has a power rating of 600W and operating frequencies of 50/200 kHz. It includes a built-in fast-response temperature sensor. For hull deadrises less than 25°. Maximum depth of 1,500'. Includes 12-pin port/starboard transducers with stainless steel stems, fairing blocks, Y-cable, bushings, mounting hardware, and installation instructions.