This 200 g calibration weight can be used to calibrate the RCbenchmark Series 1520/1580/1585 thrust stand. The Series 1520 comes with a factory calibration coefficient and this product can help you to check the accuracy of the thrust measurement.
The Series 1580/1585 already includes this calibration weight. You may purchase this as a replacement part for the Series 1580/1585.
The weights are M1 tolerance (± 0.01 g)