Adjustable StemAn adjustable stem can be modified in a way that brings your handlebars up and down. This is accomplished with a two piece design allowing the stem to bend in the middle, with a bolt fastener that clamps down to hold it in the preferred position. SPECIFICATIONS * Material Aluminum Color Black Handlebar Diameter 31. 8 mm Angle Adjustable 60 degrees Fork Clamp Diameter 28. 6 mm * Specifications are subject to change without prior notice.