Shimano saint bb80 hollowtech ii bottom bracketgenuine shimano hollowtech ii bottom bracket assembly features 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 68mm and 73mm shell durable gold anodised finish easy installationa 2 year warranty is offered with all shiman