... Exquisite design with precise craftsmanship.Accord with 19 inch rack-mount standard. Optional Accessories for 19" Network Racks:19 wire manager 1U19 wire manager 2URing ... key board shelf(350mm,550mm,650mm,730mm)19 sliding shelf (350mm,550mm,650mm,730mm)19 sliding shelf heavy duty (350mm,550mm, ... unlockableoptional lock for front door and side doorbottom base19 open frame single19 open frame double