CYCLING KING Aluminum Carbon Fiber Mountain MTB Bicycle Cycling Handlebar Stem 31.8*60mm/70mm/80mm/90mm/100mm/110mm/120mm 6 Degree Material: Carbon Fiber+ Aluminum Alloy Steerer Tube Diameter: 28.6mm/1-1/8 in Handlebar Clamp Diameter: 31.8mm Stem Length: 60mm/70mm/80mm/90mm/100mm/110mm/120mm Stem Angle: +/-6 degree Weight: 60mm:125g, 70mm:134g, 80mm:140g, 90mm:149g, 100mm:156g, 110mm:163g, 120mm:170g (with 3g errors due to manual measurements)