Features: Material: Storage box casters are made of strong ABS material and small steel balls which are sturdy and durable and can easily move heavy objects without pressure after long-term use. Wear Resistance: The ball casters are made of durable materials which have strong load-bearing capacity. The edges are smooth without burrs and cuts. Roller is firm wear-resistant and smooth. 360 Rotation: Mini ball casters can slide to any angle without restriction and it is completely silent and scratch-free when applied. These ball casters allow the box to roll smoothly and quietly without harsh sound and ensure that the box will not scratch or leave marks on any surface. Easy Installation: Just stick the stainless steel universal wheel on the bottom of the box and you can easily move the heavy box. The silent wheel is smooth and quiet won't scratch the ground and is not easy to shake when pushing. Application: Mini ball caster is suitable for different types of storage boxes which is easy to move. Very suitable for cosmetic storage kitchen desktop bedroom bathroom living room and flower shelf storage. Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Specifications: Material: Stainless steel +ABS Product size: 4.5*2.7cm Package size: 8.5*18.5cm includes: 4 *Casters "