Thru-hull stainless steel low profile model. Same physical size as an SS164, with 1000W power rating. Depth and fast-response water temperature sensor. Available in High (H : 130-210kHz), Medium (M : 85-135kHz) or Low (L : 40-60kHz) frequency bands. Available with zero, 12deg or 20deg tilt with bare wire cable. Example : SS175C-12-M is 12deg model in medium frequency band.