The HPRC (High-Performance Resin Cases) HPRC4400F Waterproof Hard Case (Black) is a lightweight, waterproof, unbreakable case. The case can be used to carry audio, photo or video equipment and accessories. It meets ATA 300 specifications for shipping cases. The hard-resin shells are virtually unbreakable and the interior rubber O-ring keeps the case air and watertight. The case has an air pressure release valve. It is carried by a super-soft rigid grip handle. This case has a cubed foam interior.