Sunlite Threaded 22.2 mm 50 mm Bicycle Stems
About Sunlite - "Every year bikes change, styles and trends evolve, old bikes are in need of repairs and new bikes are waiting for that personal touch. We provide the means to keep your bike on the road and fun to ride!"
Bar clamp diameter is the diamater of the handlebar.
Stem length is measured from the center of one clamp to the center of the other clamp. This measurement is sometimes known as the reach or extension.