S&M have kept the original geometry & feel of the old race stem but have removed all non-useful material & added a 2-piece clamp design to lower the weight. Made in the USA from CNC'd 6061 aluminium. Comes in a choice of 3 lengths. section Product Specs TYPE: Top Load REACH: 49, 53 or 57mm RISE: 23.5mm CLAMPING DIAMETER: 22.2mm WEIGHT: 289g