These kits make it possible to mount any of our standard 19 Inch Panels into a 23 Inch Rack Space environment. Made of heavy gauge steel they complement our panel line and provide a sturdy mounting interface. (Kits Include: ( 2 ) Extender Plates ( 4 ) 10-32 Screws ( 4 ) 10-32 Nuts ( 4 ) #10 Lockwashers