Zipp’s service course sl stem crafted from 7075 aluminum features a shape that’s strong and light weight resulting in a best-in-class 1.85g per newton meter of stiffness. That results in no-flex sprints and accelerations. To meet every rider’s fit needs the stem is available in ±6° and ±17° angles and seven lengths from 70 to 130mm as well as a 140 and 150mm lengths for the ±6° stem only. This stem is a favorite of zipp ambassadors and pro athletes. Features: - updated distinctive zipp cosmetics - wide range of sizes and angles - service course sl os stem made for 1-1/4 steerer tube bikes - matte black nano blast aluminum - zipp quickview integrated mount available separately - lifetime warranty