The Ritchey extensions have been specifically designed for long rides and ultra endurance racing both on and off road.the Mini Sliver features a smaller version of the original padded Sliver clip-in armrests, allowing for less interference with handlebars and other accessories.the extensions are adjustable and provide a comfortable aero position. Includes interchangeable armrests Extendable 70 - 90 mm Material: aluminium 6061 Handlebar clamp : 31.8mm Handlebar sleeve width: 16mm Weight: 286g Colour: black