Profile's H2O Stem is forged from 6061-T6-aluminum so it's light and stiff, and the shot peened and anodized finish adds strength and durability. With variations of length and angle, you're sure to find the perfect position.
Stem length is measured along the side of the stem from the center of the steerer to the center of the handlebar clamp (see diagram). Keep in mind that as a stem provides more rise, its effective length decreases. In the example above, if the +17-degree stem measures 135 mm, it actually extends 108 mm parallel to the ground.