Product Description Shimano crank bolt for Dura-Ace FC-9000 - left crank arm attachment This crank bolt from Shimano (" Crank Arm Fixing Bolt" ) is compatible with the Dura-Ace crank FC-9000. The 8.5 mm short version (A-type) was used until mid-2013 and also fits older Dura-Ace cranks. In contrast, the 16 mm long version (B-type) was used from mid-2013 and is also compatible with the successor FC-R9100. The bolt is used to mount and seal the left Hollowtech II crank arm. Models:8.5 mm: Length:8.5 mm (short)Type:A-typeCompatibility:Dura-Ace FC-9000 models up to 2013, FC-7950, FC-7900, FC-R9200Note:also suitable for Ultegra FC-6650-G, FC-6700Manufacturer Number:Y-1KY08000 16 mm: Length:16 mm (long)Type:B-TypeCompatibility:Dura-Ace FC-9000 models up to mid 2013, FC-R9100Note:also suitable for Ultegra FC-6800Manufacturer Number:Y-1N218000Contents:1 x Shimano crank bolt Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com