The VW3AE0719 is a cable-entry accessory for the top of an Altivar floor-standing enclosure with separate air flows or the compact version, part of the Altivar 71 Plus and Altivar 61 Plus drive ranges.
This accessory bolts to the top of the enclosure, routing drive power and control cables through a single entry point. It's specific to the Altivar floor-standing cabinet — not a generic cable gland or a DIN-rail mount. If you're retrofitting a line that has the enclosure already, this is the factory-designed part for that top-entry cable path.