This product is either discontinued or we cannot get that from suppliers.
Garmin 010-12378-20 Airmar TM265LH, Color: Black, Frequency: CHIRP 42-65 kHz & 130-210 kHz, Power: 1kW,Beamwidth: 16°-25°/6°-10°, Maximum depth: 3000', Depth/Speed/Temperature: Depth and Temperature, Number of pins: 12, Cable length: 39, Supported deadrise/Transom angles: 3°-21° transom.
Garmin's plastic transom mount performs well in deep water and provides exceptional bottom and water column detail.