Description: - 4 Pieces Labor Saving Caster Pulley Wheels made of quality ABS and Stainless Steel material, heavy duty, durable and multi-functional. - Easy to use- just sticking on the wheels on the bottom of box can make it easily moved. - Ball bearing 360-degree rotatable paste pulley can slide to any angle without any restriction and silent while using. - Strong adhesive sticker at backing without worrying falling off and smooth enough won't scratch your floor, carpet or tabletop. - Perfect for moving and cleaning, and suitable for kinds of boxes such as baby toys car, storage box, cloth bin, storage container moving castor. Specification: - Material: ABS Stainless Steel Size Chart: 4.4x1.5CM/1.73x0.59inch Package Includes: 4x Paste Caster Wheels Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!