●Polypropylene ●Creates Additional Storage - Creates instant under bed storage space. Ideal for bed, sofa, table and chair at your home and office. ●6 Inch Height - With Tuffen bed risers, you get an extra 5.3” under-the-bed storage space! ●Heavy Duty - The bed risers are made with high quality durable materials. Engineered to hold up to 1500 lbs. ●Fits Most Furniture –Raising your bed or couch will give you plenty of new space to store clothes, shoes, bags, luggage and more. Risers may be stacked together when not in use. ●Note - The risers are not suited for recliners. Also, please make sure the furniture legs are not thicker than 2.75" to ensure the right fit that give steady base to the furniture.