This product is either discontinued or we cannot get that from suppliers.
Garmin 010-11635-20 Airmar B75l (0 Degree Tilt), Frequency: CHIRP Low (40-75 kHz), Power: 300 W, Beamwidth: 32/21, Maximum depth: 1,100 ft., Depth/Speed/Temperature: Depth and Temperature, Number of pins: 8-pin, Cable length: 39 ft., Supported deadrise/Transom angles: 0°-7° degree deadrise.
This bronze thru-hull mount transducer is designed to allow both traditional and spread spectrum scanning when used with a compatible sonar.