BagCheck compares the three recorded measurements in the best physical orientation. It does not invent a missing axis label or assume that unknown protrusions are included.
Source
Where these details came from
Last checked
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Evidence
Retained first-party Shopify feed object (handle dex45). DEX pack carried as backpack/duffel; publisher prints dual unit (inches 21 x 13 x 9.5) - the printed metric triple is stored. No empty/unladen/tare weight line (BASE-WEIGHT is not an empty-weight basis) -> emptyWeightKg null.