The tool box is made of quality plastic which is highly waterproof, dustproof and durable. It's built in shockproof material effectively protects the tools inside from crack and damage. External Dimensions：L 13.8" * W 11.8" * H 6.5"; Internal Dimensions：L 13.7" * W 11.4" * H 5.9". The hard case is portable when you go out for a trip and because of its light weight and small in size. Vigorously tested, the case can keep your valued electric devices safe in the most of bumpy road conditions. Its high quality pressure valve releases built-up air pressure while keeping water molecules out which keeps your valuables dry with its water tight sealed performance. The interior of the toolbox is extremely well padded so you can simply change the internal layout to store different items as you wish. The multi -layer foam alsos protect your items from damage. This tool box stores products for most of the daily necessities that are not large but need to be protected, such as your drones, outdoor experimental equipment, electric device, etc.