New Takeoff Shimano Dura Ace 7800 CS-7800 10 Speed Cassette 12-23T Titanium. 12-23, super light weight 10 speed cassette. Item Details: Condition: New Other Number of Speeds: 10 Speed Smallest Sprocket: 12 Tooth Largest Sprocket: 23 Tooth EJR Guarantee. Good things come in pairs. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Cassettes, Freewheels & Cogs". The seller is "ejrecyclery" and is located in this country: US. This item can be shipped worldwide.