Genuine Shimano replacement part

• Length of screw thread is increased to enable the fitment of chain devices
• Set includes left and right hand cups, spacers, inner cover, and inner O-rings
• Light weight seal structure helps to remove vital grams
• Sealed cups keep out dirt and water
• Maintenance free
• Compatible with 68 mm and 73 mm shell
• Durable gold anodised finish
• Easy installation