Sram Red 10/11 speed rear derailleur, short cage. Used but v good condition. 10 speed model, but 100% compatible with 11 speed sram shifters as the pull ratio is the same and all indexing taken care of by the shifter. I ran this with 11 speed shifters. This item is in the category "Sporting Goods\Cycling\Bike Components & Parts\Rear Derailleurs".The seller is "rider1981" and is located in this country: GB. This item can be shipped to United Kingdom.