PP AND PET MATERIALS - The suitcase casters are made of high-quality PP and PET materials. With these casters, you can move your scaffolding flexibly, sturdy and durable. Flexible rotation, resistance to load, you can use them for a long time. EXCELLENT WORKMANSHIP - Silent, the suitcase casters are widely suitable for trolleys, chairs, cabinets or other furniture, exquisite workmanship, important luggage repair accessories, practical. USING INSTRUCTIONS - Open the case, unzip, find the location of the screw, unscrew the screw, and then screw on the new wheel, which can save energy and easily move tables, seats, shelves or other heavy objects. MULTIPLE SCREWS - The total height of the wheel is 9 cm/3.5 inches, the diameter of the wheel is 6cm/2.4inch, equipped with multiple screws for installation, bringing you greater convenience. FIRM INSTALLATION - Fashionable appearance, not easy to damage, does not take up too much space, firm installation, easy storage, ideal for transporting