Titanium Ti Stem (GR1/GR2/GR5)UltraLight Ti Titanium Mountain Bike/MTB/DH Stem 31.8-5 degree with steel boltsMade of Ultra light Ti3Al2.5V Titanium, normally for Aerospace Industry usageCNC Machined and Polished surfaceStrong enough even for Down HillClamp size: 31.8mm, 25.4mm, Steer tube: 1 1/8"Length: 110mm 100mm 80mm 70mmDegree: 3degree 5 degree 7degreeE-mail:tibicycle@126.comwww.tibicycleparts.com