The Allegro service is operated using Sm6 trains built by Alstom, which are electric tilting pendolino trains, specially equipped to operate on both the Finnish and the Russian railway technical systems, which vary substantially.

BFG International partnered with Alstom to supply fully integrated toilet cabins for this train, comprising a total of 24 Standard toilet cabins, 4 universal toilet cabins, and 4 staff toilet cabins. The toilet system also called for fire retardant polyethylene fresh water tanks which meet DIN 5510 fire propagation specifications. These were produced at BFG’s France facility and delivered ready for installation. The trains were assembled at Alstom’s Savigliano facility in Italy.