VidPro Notebook Black Sleeve fits up to 17-Inch This mount is designed to hold the following devices: Cell Phones (check measurements below for dimensions); 2-Way Radios; GPS Devices; Works with OtterBox (Defender, Commuter, Impact) Cases, Phones with Bumper, Twisted Metal Case and More; Ball Size: 1" Rubber Ball "B" Size; /!\ Note Part number reflects product packaged in clear clam shell for store shelf display. Perfect rugged solution for the Blackberry, HTC Evo, Droid X, iPhone, and More Use on your Motorcycle, ATV, UTV, Car, Boat and More Mount will attach to flat surfaces with the following dimensions: Min: 4.4mm / 0.17" Max: 28.0mm / 1.12" Material High Strength Composite & Powder Coated Marine Grade Aluminum