These are all genuine DellOrto jets flow tested at the factory.

It is important to note that Dellorto measures its jets by flow rate rather than size. This means you cannot use a gauge to measure these jets—the number printed on them is the correct specification, as they are calibrated by flow rate. Always ensure that you use original Dellorto jets to achieve the most precise performance and avoid imitations.

Beware of cheaper jets without the “INC” diamond logo which may not be the correct size