Edge Wahoo ELEMNT Stem Mount Adjustable K13530W An excellent choice for mountains, cross and road cyclists who prefer to have the device over the handlebars. The holder replaces a standard spacer of 5 mm and is securely fixed by the compression system of the top cap. Features: compatible with Wahoo Elemnt Material: 6061 T6 aluminium/CNCfinished Diameter: 31 mm Weight: 21 g Manufacturer Item No. K13520W thickness: 5 mm, length 50 mm (centre to centre). Made in Boise, Idaho, USA.