Alstom Metropolis trainsets can be custom ordered with closed-circuit television (CCTV), wider seats, additional grabpoles, more space near the doors, wheelchair space and equipped with electronic displays (six in each car), showing station information, safety messages and videos, commercials and movie trailers. Glass used for the windows on the cars are produced by Sekurit Saint-Gobain and is called 'Climavit'. It is claimed to reduce noise level in the cars by 5 decibels. It is also double-glazed to provide comfort for passengers in the cars. Glass used on the doors of the cars are produced by Starglass.