These protective cases are made of durable polypropylene, providing a strong and reinforced construction. They are designed to be watertight and dust proof, making them ideal for outdoor use. The added pick-and-pull foam insert offers impact-absorbing protection for your belongings. Additionally, the case features strong, secure latches that are easy to open, an adjustable pressure release valve for equalizing pressure, and pre-drilled holes for padlocks (locks not included). The interior dimensions of the case are 12 inches x 9.25 inches x 4 inches, providing ample space for storage.