YakAttack ShortStak Upgrade Kit for BlackPak Pro | 13" x 16" – Battleship Grey | Stackable Kayak Crate Extension with GridLoc Panels & Hardware | Not a Standalone Box | Made in USA

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MAXIMIZE KAYAK STORAGE – Upgrade your 13" x 16" BlackPak Pro with this two-layer crate extension, perfect for organizing quick-access gear, tackle trays, or tools on the water
TOP-MOUNT ADD-ON – This is not a freestanding box; it securely stacks on top of your existing 13x16 BlackPak Pro using shared hardware (BlackPak Pro sold separately)
CUSTOMIZABLE GRIDLOC PANELS – Compatible with Yak Attack accessories like MightyMounts, Through Hull Kits, and TracPaks—add gear inside or outside with ease
BUILT FOR THE WATER – Marine-grade polymer construction with rubber bumpers and stainless steel hardware ensures durability in tough saltwater environments
ALL HARDWARE INCLUDED – Includes side panels, bottom panel, straps, hinges, latches, and mounting hardware for a secure, wobble-free stack; easy to install with tongue-and-groove joints