Closure piece; 3-pole; for sheet cutouts; plastic; black. Cover WINSTA® MIDI 3-pole. Achieve electrical installation quickly and easily: The cover from the WINSTA® MIDI product family is the solution for a fast and smooth installation. With WAGO, you benefit from a wide range of accessories for the WINSTA® product family. Reduce costs through faster commissioning and elimination of service efforts – solutions from WINSTA® MIDI. The WINSTA® connector system is optimally designed to meet the high demands of building installation. It makes electrical installations pluggable, thereby making them faster, safer, and error-free. Thanks to the pre-assembled system solution, both assembly times and installation errors at the construction site are significantly reduced. Now also reduce your installation costs without compromising on safety and quality: With error protection, you lower service efforts and avoid unnecessary downtimes. Simple circuits, structured and fast electrical installation.