This is a 3D Printed mount made from Nylon and will clamp to 31.8mm bars. It will hold any of the current 1/4 style garmins including the 200/500/510/800/810 and 1000 models. It will either sit outfront or can be reversed to sit the unit over the stem, especially popular with MTB and CX riders. Please note not all colours are held in stock and can take up to 10 days for delivery. Please email us if your order is urgent.