A thin, lightweight crank made of forged aluminum. A compatible Shimano Dura-Ace BB7700 109.5mm BC68 will also be included. The gear crank is brand new and unused. The BB was used for test rides, and has been removed, disassembled, ultrasonically cleaned, dried, and filled with Shimano premium grease. If that, please let us know within 3 days you got the item.