SNCF Class Z 5300 are three and four car Electric Multiple Unit type for Paris commuter and regional services.
[citation needed] These stainless steel-bodied EMUs were built as 4-car units including a driving motor car, two intermediate trailers and a driving trailer.
[2] As the use of stainless steel eliminates the need for painting; the units are silver, with originally only an orange stripe between the headlights.
They are therefore nicknamed petit gris (i.e. "little gray", but also the name of a snail), couscoussière, "silver arrow" or "tin can".
Since 2011, only red-doored units subsist; red doors mean that the unit is fitted with EAS (exploitation à agent seul, i.e. "single crew operation"), and may be operated without a guard.