To accommodate 482.6 mm (19″) network components or for the attachment of component shelves and slide rails. 482.6 mm (19″) punched profile at the front, hole centre distance 465 mm (470 mm at the rear), tailored to the attachment of patch panels and cable routing rails. The mounting level may be positioned on a 50 mm pitch pattern. Minimum distance between levels 150 mm, maximum distance between levels 350 mm.