The Salt Zion Top Load Stem is a uniquely styled top load system with plenty of features to prevent bar slip. Made from 6061-T6 alloy with a forged finish creates a strong & reliable stem, with carefully contoured areas reducing weight & giving the Salt Zion Stem its distinctive look. The Zion also features a wider 48mm clamping area with STC (Shark Tooth Clamping) that locks your bars in place preventing them slipping. section Product Specs TYPE: Top Load REACH: 50mm RISE: 31mm CLAMPING DIAMETER: 22.2mm WEIGHT: 306g (10.82oz)