This is for the sale of Showdown transducer mounts. Marcum gave it a 2 thumbs up on their Facebook page, stating that it appears to be a fine crafted after market part.
It is made from T6 6061 aluminum, the best for strength and temperature change. It is powder coated in a high gloss finish. The hardware is a high-grade plastic nut & bolt rated for temperatures below minus 20 F.