The YakAttack Universal Scupper Plugs - MED/LRG are 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 ranging from 1.35" diameter to 1.70" diameter. The rigid center core gives you a nice place to push the plug in place and the pull tab makes for easy removal. YakAttack Universal Scupper Plugs - MED/LRG Features: Size - medium / large Sold in a 2 pack Fits scupper holes ranging from 1.35" diameter to 1.70" diameter Made in the USA