Container lids and pads provide additional security and protection. The bulk container lids are molded of high-density polyethylene, with structural support ribs and corner stacking support. The plastic lids are designed to keep the contents of the container secure and clean. They're available for standard container footprints ... and all stacks for space-saving storage when not in use. Additionally, solid bottom pads are available to fit open grid containers. These pads are made of black high-density polyethylene, and these pads close the container's open grid pallet base to handle very small parts.