ECF504-3DSAA is a USB 3.0 adapter cable with a 2x double stacked A type female with a shielded, chrome plated housing to 2x A type male cables||Double stack design allows for twice the A type connections in a single ECF footprint allowing users to double their cable density in their rack, panel or box||Allows USB cables to be passed through panels or enclosures using L-com's ECF style flange mount design with screw mounting for secure installation||Rated for USB 3.0 applications with 30 micro inch gold plated contacts to provide reliable connections with repeated mating cycles||Shielded and Unshielded Double Stack housings available for user grounding preference as well as female to female coupler/adapter designs and female to male terminated adapter cables