Features: High quality of materials. Made of steel,it is high intensity and durable. Flexible rotation and . Infiltrate in silence. Suitable for majority of all hidden,semi hidden and external bearing handset. 1 pc of bearing only,other accessories demo in the picture are not included! Specification: Material: Bearing Steel Type: 52mm Color: Random delivery,if you buy more than one,then the color you received will the same or different colors. Size:5.2cm/2.05in Weight: 33g Quantity: 1 Pc Package includes(without retail package): 1 x Bicycle Bearing