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Product Description

OIML Class M1 Cast Iron Bar weights

UK manufactured M1 Calibration Test Weights are constructed from top quality cast iron.

All weights supplied with certificate of calibration, traceable to National Standards.

As well as new weights we also offer a recalibration service on customers existing test weights.

M1 Class Test Weights: The most widely used test weight class on the market today.


Weight Costs

5kg Cast Iron Bar – £105.31

10kg Cast Iron Bar – £142.64

20kg Cast Iron Bar – £177.78



These weights are used to calibrate scales and balances were exact precision is necessary.

All class III scales use these weights for reference and calibration.
Scales that have a resolution of 0.1g upwards should test with M1 Class.

Prices start from £105.31

Bar Weights from 5kg to 20kg


  • High Quality Test Weight for Industrial and Commercial Scales
  • Denomination – 5kg – 20kg



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