Steel alloy track with black roadbed; 2/card The rerailer is designed to correct derailments that sometimes occur during normal railroad operations. Rerailers are installed after difficult sections of track (turnouts, crossings,S” curves, etc.) where derailments may occur. WARNING: CHOKING HAZARD – SMALL PARTS! NOT INTENDED FOR CHILDREN UNDER 3. Bachmann’s exclusive E-Z Track system makes set-up quick, easy and fun. Steel Alloy rail. Black roadbed. E-Z Track System – Snaps Together, Stays Together on Floors, Tables and Carpets.