Check the listing for details. Bed Risers 3 or 6 Inch Heavy Duty Stackable Furniture Risers for College Dorm Be. Color: 3 Inch Balck, Condition: New, Made in China. Listed at 22.95 USD. PlasticDimensions of bed lifts risers -- Extra 3" High. The external size: 3.85 * 3.85 * 3.3 inch. The internal size: 3.25* 3.25* 0.6 inch.Material -- Square shaped bed risers 3 inch heavy duty is made of sturdy, anti-slip plastic and won't scratch floors.Its strength can handle heavy duty furniture up to 2200 lbs.Stacking design -- Bed risers for dorm twin xl give perfect elevation with stackable option, can lift furniture to 3 inches, and you can also stack them to get more height.Occasion -- Thse bed frame risers fit into raising up desk, chair, sofa, couch, table, cabinet and christmas tree.Benefit -- Sofa risers not only give you more under bed storage space, they also aid in better sleep or for those with backache. And the added height allows for air that is more dust-free. Product Description Color Black Black Black White White Rising size 2 or 4 inch 3 or 6 inch 3.4 inch 3 or 6 inch 3.5 inch 3 or 4 inch Stackable ✓ ✓ ✓ ✓ X X Pack 4 pack 8 pack 4 pack 4 pack 4 pack 4 pack Advantage The height fits sweeping very well recommended for furniture with wheels, or stack into 6 inch recommended for table, desk, chair wide, recommended for 4x4 inch legs recommended for round legs recommended for multiple types legs