has length 11 studs which is about 8.8cm but the other wire
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996ac15blue (Inv) Electric, Wire 12V / 4.5V with 2 Leads, 14 Studs Long with 4 Blue Electric, Connector, 1-Way Male Rounded with Hollow Pin (x466c14 / 996ac01) Parts: Electric, Wire & Connector
has length 14 studs. The length of these two items should be the same but the
length of the latter one included its connectors too.
Note that the length is approximate, and can vary a little bit.