Peisma is a French brand whose parallettes are designed, prototyped and assembled in France, with FSC-certified wood from European suppliers.
Their model is dismountable: the wooden grip bars come in several lengths, from 30 to 60 cm, and mount on the same base. You can change bar length without buying a new pair.
They developed the design with athletes from the French calisthenics scene. The team is involved in that scene itself, running competitions, workshops and street workout associations.