Glass-filled nylon?? stainless steel Torx T25 bolt</br>Weight: 20g</br>Compatible with Garmin 200?? 500?? 800</br>Fits 31.8mm handlebars</br>The QuickView was designed to put the Garmin Edge Computer out in front of the stem.</br></br>Product Description</br></br>Interface turn twist Garmin Edge 200/500/800 etc. Clamp size 31.8mm or 22.2mm for the TT version Injection mold nylon/glass fill Bolt T25 stainless Average weight 20g Adaptor for older Garmin 605/705 available</br><br/>http://www.amazon.com/gp/product/B00E20K5HW