This product is either discontinued or we cannot get that from suppliers.
GARMIN 010-11927-20 Airmar B150m (0 Degree Tilt), Frequency (kHz) 95/155, Power (W) 300, Beam Width (Deg.) LF/HF (-3dB) 26/17, Max. Depth (ft.) 750, Depth/Speed/Temp D/T, # of Pins 8, Cable Length (ft.) 39, Supported Deadrise/Transom Angles 0-7 Deg. Deadrise.
The Garmin Airmar B150M Thru-Hull Mount Transducer is an entry-level CHIRP solution that provides compatible chartplotters and fishfinders with great depth capacity and target separation.