Airmar B175M Bronze 0 Degree Thru-Hull 1kW f/Garmin w/8-Pin ConnectorB175M Bronze 0 Degree Thru Hull 1kW for Garmin with 8 Pin Connector The B175Ms medium frequency delivers the right combination of coverage under the boat, extended depth range, and the ability to produce clean and accurate target and structure returns in mid to deeper water. Medium frequency also provides excellent shallow to mid depth performance, bottom detail, and fish target separation. Operating at a frequency range of 85 to 135 kHz, this