YakAttack Universal Scupper Plugs - This soft rubber scupper plug is designed to fit circular scuppers in your sit-on-top kayak. The conical shape and hollow design allow for the rubber construction to accommodate scupper holes. The rigid center core gives you a nice place to push the plug in place and the pull tab makes for easy removal. Sold in a 2 pack S/M fits scupper holes ranging from 1.13" to 1.40" diameter M/L fits scupper holes ranging from 1.35" diameter to 1.70" diameter Made in the USA