Adjustable stackable design Easily stackable spacers allow you to fill larger gaps and precisely adjust furniture height at home or in the office. Material construction Built from strong yet flexible rubber, these spacers support substantial weight and resist warping or breaking over time. User-friendly installation No tools required. Simply slide the spacers under tables, chairs, or cabinets to reach the desired height quickly and quietly. Usage and compatibility Suitable for a variety of applications including furniture leveling and door or panel adjustments on surfaces such as wood, tile, and carpet. Use scenarios - Level a wobbly dining table on a carpeted floor by adding height where needed to stabilize the table legs. - Align cabinet doors by raising or lowering one side on wood or tiled floors to achieve consistent gaps and smooth operation. - Fine-tune panel clearance between adjacent surfaces, improving fit and reducing rubbing on uneven floors or thresholds.