The 12-1/2 inch diameter Top Shelf Marine Bucket Litter Lid will fit most 3.5 to 7 gallon buckets (sold separately). This patented lid was designed to keep trash from blowing around in your cockpit or, even worse, flying overboard. Easily snaps on and off, making it simple to do your part to keep plastic out of the water. Perfect for boaters, campers, hunters, the beach, truck beds, utility trailers, swamp buggies, the poolside, picnics, and much more.