Ferodo's racing pads are available in various compounds, the choice of which depends on the application and driver preference. Follow the links below to understand the characteristics of each material. All part numbers in the range section of this catalog have a suffix. This suffix identifies the material compound available for each part number H: DS2500 C: 4003 R: DS3000 W / WB: DS1.11 Z / ZB: DSUNO G / GB: DS3.12 S / SB: DS4.12 D / DB: DS1.08 F / FB: DS3.1146