STM Dux Plus Tablet Case for iPad Air 11" M3/M2 & iPad Air 10.9" (5th /4th Gen ) - Black. . DUX PLUS - iPad Air 4th gen. Tested to exceed U.S. Mil-Spec drop tests, Dux Plus Duo withstands the rigours of the classroom, work, and everyday use. Designed with educators’ and IT professionals’ input, the case features our patented magnetic closure, a transparent back for asset tagging or user customization, and integrated storage that accommodates the Apple Pencil.. - Super protective polycarbonate and rubberised bracket. - Clear back to customise your device, scan a barcode tag or allow your pristine device to shine through. - Durable and water resistant polyurethane cover to ward off occasional drips or spills. - Patented magnetic closure allows for easy folding for typing or viewing.