New. Boxed. 90 mil 5 gallon bucket made of FDA Compliant High Density PolyEthylene (HDPE). Gamma Seal Lid seals with an O-ring gasket. Gamma Seal is user installed but may be preinstalled for packaging efficiency. A rubber mallet (not included) is typically used for installation of the Gamma Seal ring onto the bucket. The Gamma Seal lid then spins on and off engaging the threaded ring and sealing with the O-ring gasket.