Yak Gear Universal Scupper Plug 6 Pack Set Scupper plugs act as sealant to the self-bailing scupper holes to keep extra water out of the cockpit of your sit-on-top kayak These plugs fit any scupper hole with a circumference ranging from  inch to 1-1/2 inch Universal scupper plugs fit any scupper hole ranging from 3/4" to 1-1/2" Each kit contains 6 scupper plugs