(a) They must be made of metal.
(b) Their diameter must be between
70,5mm (minimum) and 80mm (maximum).
(c) They must weigh between
650 grams (minimum) and 800 grams (maximum). The trade mark of
the manufacturer and the weight must be imprinted on the boules
and must always be legible.
(d) They must not be weighted nor sand
filled. As a general rule, the boules must not be tampered with
in any way, nor altered or modified after machining by the
approved manufacturer.
Re-tempering the boules in order to modify
the hardness applied by the manufacturer is forbidden.
Nevertheless, the player's name and forename
or initials may
be engraved on them, as well as various logos, initials and
acronyms in accordance with the manufacturer's specification.