This versatile stem features a hard-wearing aluminium construction, which allows it to handle all the abuse that's associated with long days in the mountains. FSA has also put this model through a CNC-machining process, so you can enjoy its fantastic strength without worrying about adding any unnecessary weight to your ride. Manufacturer's Part Numbers: 100mm: 175-0031070970; 120mm: 175-0031072970; 70mm: 175-0031091970; 80mm: 175-0031093970 & 60mm: 175-0031094970