... appearance with high quality,Exquisite design with precise craftsmanship Optional Accessories for 19" Network Racks:19 wire manager 1U19 wire manager ... duty (350mm,550mm,650mm,730mm)19 fixed shelf (350mm,550mm,650mm,730mm)19 fixed shelf heavy duty (350mm,550mm,650mm,730mm)19 ... base19 open frame single19 open frame double 19" Network Cabinet Accessories(Fixed Shelf)