The Grainger 4" Outside Diameter Drum Cover is made of polyethylene and has a 4" outside diameter to fit over open-top 55-gallon drums. It features a leakproof seal and protects drum contents from dust, dirt and moisture. The translucent material allows users to easily check drum levels. This cover meets EPA Container Level 1 standards for hazardous waste containment. It is lightweight, flexible and shatter-resistant. The Drum Cover can be used for storing and transporting a variety of materials including chemicals, food ingredients and pharmaceuticals. This product helps companies comply with regulations for safe chemical storage and transport.