Seattle Sports Scupper Plugs keep water out of most sit-on-top kayak scupper drains. These glow-in-the-dark silicone scuppers feature a tapered, flexible design that is easy to push into most scupper drains. Sold as a pair.Tapered universal fit scupper plug fits scupper drains of most sit-on-top kayaks to keep water out. High visibility, glow-in-the-dark plugs are easy to find. Soft silicone construction flexes easily, making these easy to insert and remove. Sold as a pair.