Eclat's Onyx Stem utilises cold forging technology in its construction rather than CNC machining, resulting in a smooth unique shape with huge strength advantages over a traditional CNC stem. Made from 6061-T6 alloy with a cold-forged process ensuring the Onyx is strong, looks good & is affordable. With internal machining to help save weight & STC (Shark Tooth Clamping) that really bites down on the bars keeping them from slipping. section Product Specs TYPE: Top Load REACH: 50mm RISE: 33mm CLAMPING DIAMETER: 22.2mm WEIGHT: 316g (11.12oz)