Wide Applications: The ball casters are suitable for different types of storage boxes and make them easy to move. Wear Resistance: The ball caster is made of high quality ABS and stainless steel, durable and s a large load capacity. Easy to Install: The ball caster features adhesive design, the caster can be installed on the bottom box without complicated process. Quiet and Convenient: High quality caster rotation and precision ball bearings in the sft make rolling easy. The internal bearing of the wheelcir foot rolls quickly, the surface is smooth, will not be blocked by crumbs, ir and sand, you will enjoy smooth and quiet movement. Shock Absorption: No noise, no scratches. Ball casters ve high shock absorption performance. These ball casters allow the box to roll smoothly and quietly without making a rsh sound and ensure tt the box will not scratch or leave marks on any surface. Product Description Color:4 Pieces Features:Product size: about 1.4 * 2.8 * 4.5cm / 0.55 * 1.10 * 1.77in Packing size: about 18.5 * 8.5cm / 7.28 * 3.35in Weight: about 40G Packing List: 4 * Adhesive Ball Caster Only the above package content, other products are not included. Notes: 1. Due to differences in camera equipment, light brightness and display screens, the color of the item may be slightly different from the color shown in the picture. 2. Due to manual measurement, please allow a tolerance of 0.1-2 cm.