Navitech Rotational Air Vent GPS / Sat Nav Car Mount Holder For Garmin Nuvi 2447LMT / Garmin Nuvi 2497LMT Attaching to Air Vent firmly without damaging the air vent slats 365 degree strudy operational head to your Garmin A full 2 piece air vent mount for your Garmin The ball joint is 17mm in diameter Fully under a 3 year warranty