L-shaped angle iron drilled and tapped for 10-32 screws to provide for mounting of equipment every 'one rack space'=1.75".
Rack ears: Metal tabs or extensions to the housing of a device that allow it to be mounted with screws in a standard 19" equipment rack.
Rack ears: Metal tabs or extensions to the housing of a device that allow it to be mounted with screws in a standard 19" equipment rack.