# The Weights and Measures Regulations 1963, Regulation 43


Metric weights (other than carat (metric) weights), including counterpoises—
(a) if made of iron, shall be of the hexagonal type;
(b) if not made of iron, shall be of the cylindrical, hexagonal, flat or wire type;
(c) if of the cylindrical type and of a purported value of 5 grammes or more, the height of the cylindrical portion shall be approximately equal to the diameter.

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Source: https://www.legislation.gov.uk/uksi/1963/1710/regulation/43 (the official version)
Page: https://openlegislation.uk/weights-and-measures-regulations-1963/regulation-43
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.