Dust Covers prevent short circuit damage from exposed port connectors. The black rubber dust covers have an easy to use pull tab and fit securely preventing dust and debris from getting into the connectors. These dust covers are sold as singles.

HDMI uses 3 main connectors:
Regular HDMI - Used on most computers, TV and DVD players
Mini HDMI - Used mainly on larger DSLR cameras and tablets.
Micro HDMI - Used on smaller cameras and some smaller tablets.