Fits any 3.5 to 7 Gallon plastic buckets. Re-seals Your Bucket. Easy Opening Lid. Spin off to open, Spin on to close. Approximately 12" diameter. Food Grade Plastic, BPA Free. 7 colors! Color code your storage containers.
Brief overview of Installing a Gamma Seal Lid onto a Bucket
How to separate the Adapter Ring from the Gamma Seal Lid video (extended version)
How to Install the Adapter Ring onto a Bucket video (extended version)