1. Patent high impact resin with shock resistance, making its quality superior to similar products. 2. Adopting anti-aging O-ring, protection level can be up to IP67. 3. Patent air valve can automatically adjust the pressure inside and outside case under environmental changes. 4. Ergonomically designed handle, maximizing comfortability. 5. Double-piece lock with lever principle, easy to open or close. 6. Patent foam can be cut or customized to protect your equipment flawlessly.