Navitech Car Windscreen Suction Mount Ball and back plate clip For The Garmin Nuvi 65 / 65LM / 65LMT / 66LM / 66LMT Full Clip and Lock System to windscreen full ultimate hold 365 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