Nylon designed to hold a 200, 500 or 800 Garmin in the middle of a pair of integrated handlebars. This mount bolts onto the underside of the stem using the two bolts that should already be in place. They have been tested with Pro Stealth and Cinelli Ram bars but may work with others.
http://www.racewaredirect.co.uk/#/shop/4559567829/Garmin-200-500-800-Integrated-Mount/1499216