The extendible shelves are easy to install at the four 483 mm 19 profile rails of your 483 mm 19 cabinets due to the sturdy perforated sheet steel with a high load capacity they are the optimal surface for your network components an attached handle can be installed to faciliate the extension of the shelf available in standard color grey ral 7035 and black ral 9005 for fixing at the four 483 mm 19 mounting profile rails extractable with handle bar sturdy perforated sheet s