This product is either discontinued or we cannot get that from suppliers.
STM Dux Case STM-122-094M-01, Macbook Air 13 Inch, Black, Polycarbonate, thermoplastic polyurethane (TPU), Rubber feet, Designed For Apple MacBook Air 13.3" (Late 2010, Mid 2011, Mid 2012, Mid 2013, Early 2014, Early 2015, Mid 2017).
The STM STM-122-094M-01 case has reinforced corners for added security along with a clear back panel, so you can showcase your MacBook Air's design.