Out Front Mount 31.8mm To Fit The GARMIN EDGE 200/500/800/510/810/1000 Made of strong Delrin Plastic New Aero Dynamic Mount Center your Garmin Edge in front of your stem for increased visibility Fits 22.2mm Bars Solid, stiff & secure grip. Easy to fit - no need to remove tape/grips/levers etc., simply opens up and you bolt on with an allen key (not included) Approximate Weight: 18g Fit with following cycling computer including: Garmin Edge 200/500/800/510/810, Bryton Rider 20,21,30,35,40 (wont fit 50)& Mio Compatible with computers with 1/4 turn twist lock interface. Note: doesn't fit Bryton 50 & Garmin 710