Under manufacturer's reference 2206 from MARKLIN, 168.9 mm unballasted straight rail in 3-rail alternating current, with realistic profiles and finely reproduced sleepers.
Straight rail to scale HO 1/87th, code 83, for trackK.
The K track can be integrated into an old track M layout using the MARKLIN transition rail reference 2291.
transition track MARKLINreference 24922 allows the K channel to be combined with the C channel.