Navitech dash air vent / vent mount ball and Back Plate Clip for the Garmin Nuvi 50 50LM 50WE 50 Uk GPS Sat Nav Full Clip and Lock System to windscreen full ultimate hold (up to 7kg in weight) 361 degree strudy operational head to your Garmin A full 2 piece windscreen mount for your Garmin The ball joint is 17mm in diameter Fully under a 3 year warranty