Easy to use cam-action plugs have a variety of uses on boats.Made from rubber and neoprene, these expanding rubber plugs are great for livewell tanks, buoyancy tanks on day sailers, and small thru-hulls. Usage is easy, just insert the plug into the hole and flip the lever to expand the rubber and hold the plug in place.Key Features Cam-action lever expands rubber to hold plug in placeMade of neoprene and brassDiameters to fit 1/2", 5/8", 7/8" holes Sold in pairs