Nickel silver track and gray 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. Also available in the E-Z Track® system is an 18" Radius Curved Terminal Rerailer (Nickel Silver; 1 per card; Item No. 44502) if you need a rerailer and a power connection.