【Model No.: X8320】Internal dimensions of the case: 40.2x26.4x2.7cm (15.8x10.4x1.1inch). 【Compatibility】Designed to perfectly fit for ①17.3 inch Acer Aspire 5 Laptop-A517-53-78TS Laptop;②17.3 inch Acer Aspire 5 Laptop-A517-53-58XA Laptop;③17.3 inch Aspire 5 A517-52-75N6 Laptop;④17.3 inch Aspire 3 A317-53-57FK Laptop;⑤17.3 inch Aspire 3 A317-53-38Y1 Laptop. 【Anti-Shock & Waterproof】 EVA hard sleeve and features internal upgraded shock resistant padding layer, protect your laptop from inadvertent collision and accidental scratches when put in backpack or suitcase. The Smatree sleeve is made of durable 1600d nylon, it obstructs water effectively. Don't worry about splashing water, washable when laptop sleeve case becomes dirty. 【Fashion Style】Unique diamond pattern on the surface makes your case unique, personalize your laptop with its own unique style. 【Customized for Acer Laptops】Smatree has more than 20 sizes of hard EVA protective sleeve case customized for Acer laptops. If you're not sure which model of case is fit for your laptop, please feel free to contact our customer service.