Gamma Seal Lids - 5 Gallon bucket screw on lid. Air tight screw on lids from Gamma. These 12 diameter Gamma Seal lids will fit most buckets 3.5 - 7 Gallons in volume. Made with durable heavy-duty plastic this patented lid creates an air-tight seal once screwed on making an excellent option for food or dry storage. Assembly is easy simply push down on the outer threaded rim to attach to the bucket (use rubber mallet if needed) then just screw on the removable lid to transform 5 Gallon buckets into leak proof storage. Great for: dry foods paint hardware boating camping pet foods food storage. gamma seal lids are perfect for turning your old 5 Gallon buckets into useful airtight storage containers. Color coordinate your containers with 6 different colors! Gamma. Bucket not included.