All you need is a universal pulley that can rotate freely and has strong load-bearing capacity. Help you solve all the problems caused by heavy objects main feature: Effective and labor-saving: Just stick the universal wheel to the bottom of the box, and the heavy box can be easily moved Suitable for moving and cleaning, and suitable for storage boxes and packing boxes of various types and sizes. 360-degree free rotation: ball-shaped paste pulley, which can slide at any angle, Unrestricted, completely silent when in use. Suitable for cosmetic storage, kitchen, desktop, bedroom, bathroom, living room, lower shelf storage. Good load-bearing: The roller frame is made of high-quality ABS material, which is strong and wear-resistant and has a long service life. It can easily move heavy objects without stress. Specifications: Product name: universal wheel Outer diameter: 4.5cm*2.8cm*1.4cm Main material: ABS+304 stainless steel Product weight: about 30g Easy to use: Just stick seamless glue on the pulley and put the pulley on the bottom of the box for 24 hours to use. Smooth pulleys no longer worry about heavy objects Package Included: 4*Universal wheel