PART VWEIGHTS
Materials and principles of construction
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.