DB9 female to male panel mount straight-through connectors,Suitable for developing custom communication systems, audio/video system input/output configurations, connecting DB9 serial communication cables for safe and stable signal transmission. It is a reinforced and easy to install and use connection system, suitable for installation on walls, floor sockets, desktops, rack panels, equipment panels.Interface A: DB9 femaleInterface B: DB9 male Specification: Standard 9Pin RS232 Size: 33*27*19mm (1.3*1.07*0.78in) Package: 1*DB9 female to male panel mount adapter.