Zipp Vuka Elbow Pad Wing Extensions (for Vukaaero) (1 x Pair), 11.6618.013.000 &#xa0;Four positions reversible inwards or outwards for the ultimate in positioning Adjust the width of your arm rests to ensure optimum air flow, power transmission, and comfort when doing a TT or bike leg Bolt holes 25.0mm center to center Fits Vuka Aero, Vuka Clip, Vuka Stealth Zipp Speed Weaponry Aero Bar Parts