Garmin Part 010-10908-00 : Unique mount fits the back of the existing Nuvi cradle (cradle not included) perfectly.

Fits many Aera, Nuvi, and Dezl, models including:

AERA: 500, 510, 550, 560

DEZL: 560LMT, 560LT

NUVI: 30, 40, 40LM, 50, 50LM, 200, 200W, 205, 205W, 250, 250W, 255, 255W, 260, 260W, 265T, 265WT, 275T, 370, 360, 350, 310, 300, 465T, 500, 550, 680, 670, 660, 650, 610, 600, 785T, 775T, 770, 765T, 760, 755T, 750, 885T, 880, 860, 855, 850, 1100, 1100LM, 1200, 1250, 1260T, 1300, 1300LM, 1350, 1350T, 1350LMT, 1370T, 1390T, 1390LMT,1450, 1450LM, 1450T, 1450LMT, 1490T, 1490LMT, 1690, 1695, 2200, 2250, 2250LT, 2300, 1300LM, 2350M 2350LMT, 2350LT, 2360LMT, 2360LT,  2370LT, 2450, 2450LM, 2450LMT, 2460LMT, 2460LT, 2555LT, 2555LMT, 2595LMT, 3450, 3450LM, 3490LMT, 3550LM, 3590LMT, 3750, 3760T, 3760LMT, 3760T, 3790T, 3790LMT, 5000

Nuvi 42 42LM 44 44LM 52 52LM 54 54LM
Nuvi 2457LMT 2497LMT
Nuvi 2557LMT 2577LMT 2597LMT GPS

Fits the following Zumo car cradles:  550, 500, 450, 400