Alex Valentino Signature BMX stem from United. The Valentino stem is machined from a single block of 6061 aluminium & features a top load design with a 23mm rise. The Stem also features the stronger sold type bolts, simple side cuts & a cool recessed fork hole for that flush look with your top cap section Product Specs TYPE: Top Load REACH: 48 or 52mm RISE: 23mm CLAMPING DIAMETER: 22.2mm WEIGHT: 278g