Description<br> These are ball casters, they can swivel 360-degrees. Suitable for<br> processing machinery, furniture, machinery, toys, etc. Smooth moving and<br> wear resistant, can be used for a long time. Quiet and strong<br> load-bearing, very practical.<br> Features<br> -Color:As Shown<br> -Material:Steel<br> -Size:4.50X4.50X2.00cm/1.77X1.77X0.79in<br> - Made of high-class materials, durable and sturdy. Strong load-bearing, stable and safe.<br> - Ball transfer is suitable for electronics, hardware, machinery,<br> chemical, food, forest, books, supermarkets, rubber and other<br> industries.<br> - Used in transmission system, feeding system, processing<br> system, processing machinery and packaging machinery auxiliary<br> equipment.<br> - Moreover, it works perfectly for drawer, so that you can roll it out with minimal pull.<br> - Flexible, high-speeds and stable operation,used for rotating and changing the direction of the cargo.Package list: 8 x Ball Bearing Rollers