The jack is a small ball made of wood, usually boxwood or beechwood.
Modern regulations require the jack to be 30mm in diameter (+/- 1mm). In the
past jacks were often left "natural"—unfinished or with a clear
finish—but nowadays they are often painted in bright colors. In recent years
the FIPJP began authorizing the manufacture of non-wooden "synthetic"
or "resin" jacks, but many national organizations (including the
FPUSA) forbid the use of synthetic jacks for safety reasons.
The Obut Petqnue Cloth & Jack Set has 3 small wear-resistant wiping
cloths for petanque boules ( 20 x 20cm) made from a very absorbent
machine-washable microfibre ( 80% polyester + 20% polyamide) and three coloured