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430mm/25.4mm=16.929 inches, or ancient units that are based on ancient monarch’s body parts. 😂😂😂

Seriously. Freedom units? What you call standard, Brits call imperial. Have a ponder! In seriousness though, metric is easier. Fun fact, the massively expensive new Ariane rocket that was remotely blown up cause wasn't behaving right ended up being an incorrect o ring size. An engineer preferred working in inches and forgot to convert back. Oops!