55 Gallon w/ Plastic Cover, Greif Lok-Rim Fiber Drums 55-gallon Fiber Drum, Cardboard Barrel with plastic top and metal chimes on top and bottom. This Open Head, Greif Lok-Rim fiber drum has a plastic lid, and metal chimes on top and bottom. Fiber drum walls ensure lightweight handling, with a metal chime to add extra support for heavier materials. Locking Ring is a Metal lever lock drum ring which ensures tamper-evident shipments when you ship your UN fiber barrel. These Cardboard Drums are perfect to store dry goods as well as shipping a variety of products. Stack up the fiber with this 55-gallon open head drum with a plastic cover that is secured on both top and bottom for protection of all of your solid products.