This product is either discontinued or we cannot get that from suppliers.
Garmin 010-11636-21 Airmar B75M (12 Degree Tilt), Frequency: CHIRP (80-130 kHz), Power: 600 W, Beamwidth: 24°/16°, Maximum depth: 900 ft., Depth/Speed/Temperature: Depth and Temperature, Number of pins: 8-pin, Cable length: 39 ft., Supported deadrise/Transom angles: 8°-15° degree deadrise.
The Garmin B75M is a bronze thru-hull mount transducer that providesthe depth and temperature data to your Garmin marine network.