Adequate Quantity: the package includes a total of 20pcs 1 Inch nylon roller ball transfer bearings; This generous quantity is more than enough to cater to most industrial or commercial needs; Users will not need to worry about running out of supplies in a short period. Ideal Size: the size of the ball casters is about 1 inch, the diameter of mounting hole is about 0.2 inches/6 mm, and the load is approximately 400 lbs; This size is ideal and versatile for applications; It is neither too large to pose installation difficulties, nor too small to limit its usability; This standard size enhances the convenience and functionality for different types of users. Quality Material: the ball bearing rollers are made of stainless steel and nylon, which is hard, wear resistant, bright without burrs, not easy to rust, and noiseless. 360 Degree Rotation: these nylon roller ball transfer bearing 1 inch feature a 360 degree rotation ability; This feature enhances right directional movement, thereby enabling smooth operations; This is useful when transferring goods over different directions, significantly improving productivity and convenience. Wide Use: these conveyor rollers have a wide range of applications; They are easy to be installed on most light furniture such as shelves, chairs, serving tables, cabinets, drawer boxes, desks, table saws. Colour:Silver & White Material:Nylon+Metal Size:Diameter:2.54cm Package Contents: 20 * 1 Inch Roller Ball Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.