Garmin Suction Suction Cup for the Nuvi 30 (sku 18143)Garmin Suction Cup for the Garmin Nuvi 30. The suction cup holds firmly onto your winshield or any smooth, flat surface allowing you access to your Nuvi device whilst driving. The cradle supports and protects your device. The cradle has a ball and socket joing which allows you to view your Nuvi in multiple positions. The dash disk allows you to due your device on the dashboard, providing a smooth flat surface for your suction cup to hold onto