Feature:OOTDTY 360º common move bearings Load rating is 110 pounds eachwhere store supplies are driven and grew to become in all directionsWidely used in transmission system, processing system,processing machinery and packaging machinery ancillary equipment.Material: Zinc Alloy,Color:Size:As Picture ShowNet weights about 0.04 kg.Note:Size for guide measurement, there may be a 0 to 2 for cm error, belongs to the conventional phenomenon.And due to distinction between diverse monitors, the image won't reflect the actual coloration of the item. Thank you!Package Includes: 1 PC Roller Ball.