Navitech Car Windscreen Suction Mount Ball for Garmin Nuvi NuLink 2390, NuLink 2340, NuLink 1695, Nuvi 2440, Nuvi 2460LT, Nuvi 2460LMT, Nuvi 2240, Nuvi 2340, Nuvi 2350LT, Nuvi 2360LT, Nuvi 1440, Nuvi 465T, Dezl 560LT, Zumo 220, Zumo 660 Full Clip and Lock System to windscreen full ultimate hold 360 degree strudy operational head to your Garmin The ball joint is 17mm in diameter