Zipps Service Course SL Stem, crafted from 7075 aluminum, features a shape thats strong and lightweight, resulting in a best-in-class 1.85 grams per newton meter of stiffness. That results in no-flex sprints and accelerations. To meet every riders fit needs, the stem is available in 6 and 17 angles and seven lengths from 70 to 130mm as well as a 140 & 150mm lengths for the 6 stem only. This stem is a favorite of Zipp ambassadors and pro athletes.