Designed for Stephan August the Primo Down Stem is a classic style stem built for extra strength. Built from fully CNC machined 6061 aluminium the Down Stem is incredibly strong & durable with minimal cut outs keeping it looking classic. It features oversized bolts for increased clamping grip to stop those bars from slipping. section Product Specs TYPE: Top Load REACH: 48mm RISE: 24mm CLAMPING DIAMETER: 22.2mm WEIGHT: 381g (13.44oz)