Pushes into the trumpet/ram pipe/velocity stack or throat to measure the airflow to enable you to balance multiple carburettors.

• Instructions included.
• The original genuine high quality German made product
• Can be used for all Weber DCOE and IDF and Dellorto DHLA, DRLA carbs.with round intakes or trumpets.
• Can also be used on motorcycle carburettors with round intakes.

Total length of unit 121mm

Rubber cone dimensions:-