LGV大西洋線
They are formed of two power cars ( under 25 kV—like the TGV Atlantique) and eight carriages, giving a capacity of 377 seats. They have a top speed of . They are long and are wide. The dual-voltage sets weigh , and owing to axle-load restrictions in Belgium the triple-voltage sets have a series of modifications, such as the replacement of steel with aluminium and hollow axles, to reduce the weight to under per axle. Owing to early complaints of uncomfortable pressure changes when entering tunnels at high speed on the LGV Atlantique, the Réseau sets are pressure-sealed.