This product is either discontinued or we cannot get that from suppliers.
Brand: Garmin, Model: 010-11612-00, Type: Cable, Colour: Black, Compatible: AIRMAR B117 (0° Tilt) / AIRMAR B150M / AIRMAR B164 / AIRMAR B260 / AIRMAR B60 / AIRMAR B619 / AIRMAR B744V Triducer / AIRMAR P19 / AIRMAR P319 / AIRMAR SS164 (12° Tilt) / AIRMAR SS60 / Garmin Dual Frequency / GPSMAP 451s / GPSMAP 556s / GSD 22 Digital Remote Sounder / Plastic Thru-hull Mount Transducer with Depth & Temperature (8-pin) - Airmar R99 / Stainless Steel Thru-hull Mount Transducer with Depth & Temperature (8-pin) - Airmar SS270W.
This adapter allows you to connect newer 8-pin transducers to devices that require a 6-pin.