The bed and furniture risers are made of a high quality strong plastic construction. Add more height to your bed or furniture without the worry of the risers breaking with this heavy-duty product. The heavy-duty material of this product ensures long life of use and maximum durability. Durably strong plastic won’t give out under the weight. Sturdy plastic supports up to 1,200 pounds. Won’t scratch or dent hardwood floors. Easy to use- bed and furniture risers are super easy to use. Simply place risers in the bed or furniture area and insert the bedposts to place on top of the recessed walls of the risers. Recessed walls ensure safety and that our bed or furniture do not slip and fall. Bed risers make for more convenience. Added height helps you get in and out of bed more easily, and it provides extra storage space under your bed. Make more efficient use of space. Adjustable: Bed/furniture risers are adjustable. Customize the height of your bed or furniture with 3 convenient sizes - 3,5 or 8 inches by inserting your bedposts or casters into these bed risers. It works with a maximum bedpost diameter of 2.75 inches.