A three pack of Riot Surf Fins, assumed to be for the Riot Turbo kayaks with a hull molded for the removable fins (aka skegs). While these fins are suggested as a fit to the Boogie kayak we cannot find any supporting evidence of that claim.
Fins are kind of rubbery. Each fin is one inch in total depth. The base is 4 5/8 inches long, 5/8 inches wide. Screw holes are 4 1/8 inches on center. Comes with mounting hardware. Instructions are not included.