Model No.: X8332; internal dimensions of the case: 40.9x31.2x2.9 cm (16.1x12.3x1.2 inch) Compatibility: designed to perfectly fit for 18 inch Acer Predator Helios 18 AI; for 18 inch Acer Predator Helios 18 Gaming Laptop-PH18-71-756U/PH18-71-76B3; for 18 inch Acer Predator Helios Neo 18 Gaming Laptop Anti-Shock: 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 Waterproof: 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