Features:* * Made of high-quality material, and practical to use* [Wear resistance]: the ball wheel is made of high-quality and features a large weight-capacity bea.* [Easy to install]: the ball wheel design capabilities for glue, the casters can be installed at the bottom of the box without complicated process.* [Quiet and practical]: the rotation of high-quality casters and precision balls in the shaft make it easy to roll. The inner bea of the wheelchair foot rolls ly, the surface is smooth, it will be blocked by crumbs, hair and sand, you will enjoy smooth and quiet movement.* [Shock absorption]: no noise, no scratches. The ball wheels have high shock absorption. These ball casters allow the box to roll smoothly and quietly without making a harsh noise, and make sure the box will scratch or leave marks on any surface.* [Wide Applications]: Ball casters are suitable for different types of storage boxes and make it easy to carry. Specification:Size: 4.5cm Material: Metal + Plastic Color: Beige Package Contents:4/8/16*Wheel WheelsNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.