3" channel rack, numbered up, 1219.2mm height. Rack space identification allows quick and easy location of rack mount items. Double-sided #12-24 EIA universal mounting hole spacing. 24 #12-24 mounting screws included. Can be used with all Panduit cable management and patch panel products in addition to any industry standard 19" components. Paint piercing washers included to electrically bond rack for simplified grounding; for the complete grounding solution, see StructuredGround ™ kits for racks.