Portabrace Hard Cases (models ending with 50E) have a Empty interior. Wheeled Hard Cases have durable aluminum rail and a comfortable pullout hand grip. They are constructed with a high-performance hard-resin material reinforced at the corners. Wheeled Hard Cases are smooth rolling, have a pressure relief valve and have easy to operate latches. Wheeled hard cases are ideal for combining video, audio, and photographic equipment for transportation and protection.
 
 
Please note: the PB-285OR is not a watertight / airtight case due to the process of adding the custom off-road wheels and axle.  The case does not lose any protective strength or integrity but it will allow air to the main storage area.