SRAM XX SL Eagle T-Type Flattop Chain - 12-Speed 126 Links Hollow Pin Includes PowerLock Connector PVD Coated SilverSRAM XX SL Eagle T Type Flattop Chain 12 Speed 126 Links Hollow Pin Includes PowerLock Connector PVD Coated Silver. Specifically engineered to optimize Eagle Transmission the XX SL Eagle Transmission Flattop Chain features a unique flat top. Not only does this shape maximize shifting performance and robustness but it also contemporizes the look of your super bike especially with its outer plate cut outs and hollow pins that push the strength to weight