Vent Vehicle Mount Cradle Designed for Garmin nuvi 3597 LMTHD - Unique Auto Car Holder Clips into Air Vents. A vent mounted cradle base for use with the Garmin nuvi 3597 LMTHD device. Holder is designed to adjust to accommodate the exact required dimensions (138.4 x 77 x 13.8 mm). Spring loaded vent clips designed to accommodate both horizontal and vertical oriented air vent systems. Gomadic Holder is highly adjustable with sliding/rotating mechanisms on side and bottom ensuring easy access to all Garmin nuvi 3597 LMTHD buttons and controls. Heavy Duty foam pads (0.5 inch thick) line grips on side of holder. Made with high density construction compress to secure device when in use. Engineered using non-scratch and non-slip materials on all contact surfaces.