YakAttack Universal Scupper Plugs (2 Pack) A simple and effective way to keep water from coming up through your scupper holes on calm days or when carrying extra weight on your sit-on-top kayak. The YakAttack Universal Scupper Plug uses a hollow conical rubber design that compresses to fit a range of scupper hole diameters rather than targeting a single fixed size. A rigid centre core gives you something firm to push against during installation, and a pull tab makes removal quick and easy. Available in two size ranges to cover most sit-on-top kayak scupper dimensions. Sold as a two-pack. Small/Medium: fits scupper holes 1.13" to 1.40" diameter Medium/Large: fits scupper holes 1.35" to 1.70" diameter Hollow conical soft rubber design accommodates range of hole sizes Rigid centre core for easy installation Pull tab for easy removal Sold as a two-pack Made in the USA, covered by Built for Life Guarantee