FSK K-Force Carbon Fiber Bike Stem 31.8mmx80/90/100/110mm* 1-1/8" 6 deg. Material: UD carbon fiber weave on middle positon + Alloy2014 Body Bar Diameter: 31.8 mm, Steer Tube Diameter: 1-1/8 in (28.6mm) Length: 80/90/100/110 mm, Rise: 6 degrees Bar Attachment: 4-bolt, Weight:130g Recommended Use: cycling, road racing,MTB; Warranty: 1 Year.