Bike Mount & Water Resistant Case for 5.5" GPS Fits standard (25.4mm and 26mm) size handlebars up to 33mm diameter For bicycles, motorcycles, ATVs, anything with cylinder-shaped frames or posts Transparent, touch-through screen cover, water resistant zipper, and cable access slot 360 rotation for positioning in portrait or landscape view Works with TomTom, Garmin & Magellan GPS devices up to 5.5"