Protect your pool skimmer with the revolutionary Doughboy Skimmer Box Plug (7 13/16" x 5 5/8")! Made with a 3/4" thick Rovaseal layer, it creates a water-tight seal and prevents ice damage. It requires no installation or tools required. The vacuum port plug and skimmer box plug are UV and chemical resistant. Experience hassle-free winterization and enjoy free shipping over $50.