Universal Fir-Tree Kayak Scupper Plug
A barbed, tapered plug for the drain holes on a sit-on-top kayak. Six stepped barbs cover any hole from about 24.5 to 44 mm, so one plug works in scuppers of several sizes, and the same design keeps working after the kayak's own plugs go out of production. It has a 54 mm flange with a lanyard ear (5 mm hole), is hollow to keep it light, and has a grip bar in the cup so you can pull it out. Print it in TPU or PETG for the best seal.
outdoor kayak scupper-plug drain-plug