Features: It adopts shock-resistant and compression-resistant ABS engineering plastics and hardware stainless steel and other accessories. There are buffer rubber anti-skid pads inside, which can be easily and freely loaded and unloaded. Specially designed to protect equipment, instruments or other precision objects, waterproof, not affected by external dust or moisture, professional waterproof for case. Automatic pressure mini for valve design, better opening when encountering temperature difference or altitude pressure change. The for latch is sturdy and the for case is easy to open and close without accidentally popping open. The interior has shock-absorbing padding for small, tiny electronic devices. It can well protect the built-in equipment from being cut by for sharp stones and rock walls in the wild. It is suitable for use in rugged mountain environments, sealed and waterproof, but not suitable for diving. It is equipped with a mountaineering hanging ring. It can also be specially used to place and protect precision EDC equipment or other EDC objects. Specifications: Material: ABS+PC+TPE Small Size: Approx. 13.5x8.5x5cm/5.31x3.35x1.97inch Medium Size: Approx. 17.5x10.5x5cm/6.89x4.13x1.97inch Large Size: Approx. 20x11x6cm/7.87x4.33x2.36inch Package Includes: 1x Sealed Waterproof Safety for Case note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.