Container Knowledge Center
Practical Guidance for International Freight Containers
Clear, practical information on shipper-owned containers, cargo-worthy requirements, container grades, sizes, markings, and international freight considerations.
Featured guides
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SOC & Cargo-Worthy Containers
How shipper-owned containers work, what cargo-worthy means, and when documentation may be required.
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Container Grades & Conditions
New one-trip, last trip, cargo-worthy and wind and water tight — what each term actually describes.
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What Is a CSC Plate?
The container safety approval and data plate, and the information it commonly displays.
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Container Numbers, Prefixes & Markings
Learn how a container identification number, owner prefix, equipment category, serial number, check digit, and size/type code work together.
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More guides will be added here as they are reviewed by the Pro Box technical team.
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How this content is reviewed
Every guide in the Container Knowledge Center is reviewed by the Pro Box Inc. technical team before publication, and revisited as practice changes.
This material is general education for planning purposes. Carrier, port and transaction requirements vary, and the requirements that apply to your booking should be confirmed for your specific move.
Reviewed by Pro Box Inc. technical teamLast reviewed: September 2026
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