This installation kit is required for installing measuring devices with 5 height units (221.5 mm height) in EIA-RETMA standard 19-inch racks (487 mm width). It includes 2 handles and 2 angles, metric fasteners and corresponding metric screws. This product also corresponds to the spare part number 5188-4430. However, the mounting brackets are not sufficient to properly and securely mount heavy devices in the rack. Rails and slide rails must be ordered separately.