Garmin US TOPO MicroSD Data Card for Garmin GPS Units MapSource Topo 2008 Southeast/Puerto Rico MicroSD Card Trip and Waypoint Management Functions Shoreline Detail for Lakes/Reservoirs/Small Bodies of Water and More Highways/Roads/Hiking Trails/Snowmobile Trails 0.5 Lbs (WxLxH) 0.1" x 1.0" x 0.5"