Odyssey Bluebird single speed chain Color: NICKEL Size: 1/2" X 1/8" Length: 112L Model #: This is basically a rebranded KMC Z510HX (which since it is now discontinued by KMC, if you love the Z510HX, this is how you can still get one). Includes installed half link (gold) and a nickel "Missing Link" master link.