SPECS: Plug diameter: 0.875" (small end), 1.5" (larger end) Diameter compatibility: 1" to 1 3/8"/2.5 cm to 3.5 cm FEATURES: Tapered design to keep water out of your sit-on-top kayak Extended finger pull-tabs for easy draining Pre-drilled holes on finger tab for easy tethering Compatible with Wilderness Systems(R), Dagger(R), Perception(R), and many other sit-on-top kayaks LI> ADDITIONAL DETAILS: 4 plugs included in package