Features: 1Premium Material: Made of premium ABS and rubber the 3.5in furniture risers are durable reliable practical and has a long service life. 2Heightening 3.5in: The black couch leg risers can heighten 3.5in for bed sofa armchair and other heavy furniture help you can sit more comfortably. 3Ergonomic: With the help of ABS bed risers your furniture or office decoration can be lifted at an ergonomic height providing users with biomechanical advantages. 4Suitable: The square furniture risers are suitable for sofa couch bed chair table cabinet and other furniture leg a wide range of application. 5Convenient: The chair leg heightening protector can add storage space below your bed or sofa which is easy for robot cleaner to clean floor. Specification: Item Type: Furniture RisersMaterial: ABS RubberWeight: 1510g/3.33lbColor: Black Size: Approx. 11.5x11.5x10.5cm/4.53x4.53x4.13in Hole Diameter: Approx. 8.1cm/3.19in Heightening Size: 3.5in/8.89cm (Furniture Leg on It Can Increase 3.5in)Purpose: For Furniture Leg Package List: 4 x Furniture Riser4 x Pad4 x Lid