Greenco Adjustable Bed and Furniture Riser,Great For Under Bed Storage, 3 Height Option Risers, 8 Inch Bed Riser 100% Plastic Imported Customize the height of your bed or furniture with 3 convenient sizes - 3 inches , 5 inches or 8 inches by inserting your bedposts or casters into these bed risers. It works with a maximum bedpost diameter of 2.75 inches. Made of heavy-duty unbreakable plastic; can carry even the heaviest furniture in your home. Great for creating more storage space underneath your bed. May be conveniently used on virtually any type of bed; features a 1-inch raised edge to keep bedpost or caster securely in place. Bed risers may be stacked together when not in use to conserve space.