Garmin Nuvi GPS Cradle Fits 200, 200W, 250, 250W, 260, 260W, 270, 205, 205W, 255, 255W, 265T, 265WT, 275T
I was a little worried about buying this as it did not specifically say it would fit the Nuvi 285 GPS, but I figured Garmin did not vary their form factor much and it looked like the one I had but lost, so I took the chance.  It worked perfectly, so if you are an owner of the 285 group of Garmin GPSs this will work for you.