Transform standard 3.5 and 5 gallon our (white or black) buckets into air-tight, water-proof, leak-proof, pest-proof storage containers with this Gamma Seal Lid. This patented two-piece sealing system is very easy to use. Simply snap the universal adapter ring onto your bucket and spin-on the removable, threaded lid. Can be used for dry or liquid storage. Made from high-density polyethylene. FDA-approved food-grade plastic. BPA free. Approximately 12 in diameter.