SOLID MATERIALS : Durable PP furniture risers can hold up to 3300 pounds of furniture. They won't wobble and are easy to use. More stable (Diameter: 2.71", Height: 2.55") ADJUSTABLE DESIGN : Bed risers can be easily assembled to a suitable height. Additional space has been added under the bed and furniture to make cleaning more convenient ANTI-SLIP SHOCK ABSORPTION DESIGN : The bottom of the riser is designed with TPU non-slip rubber pad, it can protect furniture and floors from scratches, and reduce vibration. Risers apply to raise beds, sofa, couches, cabinets, tables, chairs, and fridge PACKAGE CONTENTS : There are 4 sets in the box, each set includes 2 black risers and 1 TPU bottom. Tips: As the furniture has a certain weight, it is best to install it by two people to ensure safety. Please check the size before purchasing the product.