Translucent 18x24 in. Shelf Liner. Add to any Honey-Can-Do shelving unit for an instant work surface or flat surface for storage. These durable, flexible shelf mats are made from 7 mil thick polypropylene to protect shelves and create a solid surface for storing smaller items. Designed to fit 18x24 in. steel shelves (SHF350B1824 or SHF350C1824).