Specifications:Made of high-quality ABS material, it is wear-resistant and durable, long-term ownership, and long service life.These spare casters allow you to roll smoothly and quietly without making any harsh noises and ensure that you will not scratchor leave marks on any surface.It is widely used for storage of mobile boxes, toy boxes, toy boxes, trash cans, storage boxes, etc.Adhesive design, you dont need to punch, just stick to the bottom surface of the box, very simple. Item Name: CastersMaterial: ABSQuantity: 4PcsFeatures:Universal, Adhesive, One-way Size: 4.5cm x 2.2cm x 1.5cm/1.77" x 0.87"x 0.59"(Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:4 x Casters (Others Not Included)