The YakAttack BlackPak Pro is a product made by YakAttack, a company that manufactures kayak fishing gear and accessories. It is a fishing tackle storage system designed to be mounted on a kayak.
The ShortStak Upgrade Kit fits atop BlackPak Pro, offering extra storage. Its design mirrors BlackPak Pro's, but at 40% height. Angled edges ensure a water-tight fit like the original lid.