Garmin Card Door f/GPSMAP 840xs 1020xs & 1040xs SD. Specifications for Garmin SD Card Door f/GPSMAP 840xs 1020xs & 1040xs: Manufacturer: Garmin Color: Black Package Contents: Garmin SD Card Door f/GPSMAP 840xs 1020xs & 1040xs Garmin 010-12133-00: Card Door f/GPSMAP 840xs 1020xs & 1040xs SD Garmin 010-12133-00: Card Door f/GPSMAP 840xs 1020xs & 1040xs SD