Synchrometer (type SK) air flow meter, made by STE in Germany,
Ideal for balancing and adjusting carburettors.
The SK model fits intakes from 1 5/8" upto 2 1/8" making it ideal for setting all Weber Carburettors and most other manufacturer carb applications with inlets upto 2 1/8"
in size.
This model has an air flow range from 1 to 30 kg/h, with an extended calibration between 1 to 3 kg/h to make idle secondary throttle adjustment easier.