Garmin Bronze Thru-Hull 1kw 50/200 kHz comes complete with a High Speed Fairing block. The B258 style transducer is 25 times more sensitive than a single element transom mount 50/200khz transducer which leads to a much clearer picture and the ability to reach deeper depths. 23 degree and 50Khz and 14 degrees at 200Khz. Garmin part# 010-10703-20
Product Accessories for Garmin B258 8 Pin Bronze 1KW Thru-Hull Transducer with Fairing Block
PropSpeed's FoulFree Transducer Coating Kit is the biggest advancement in transducer paint and coatings in the last 30 years. It will keep your thru-hull or transom mount transducer free of marine growth. This nontoxic formula has zero leaching of harmful chemicals into water unlike traditional anti-fouling bottom paints and is certified by Airmar.
Garmin's 010-11612-00 adapter allows you to connect newer 8-pin transducers to Garmin GPS Units that require a 6-pin connector.