Set of members for a drug delivery device, drug delivery device and set of drug delivery devices

A drug injection device comprising:

• a main housing comprising a tubular shape provided with at least one tactile device marking,
• a housing body, which is part of the main housing,
• a drive mechanism arranged at least partly within with the main housing, the drive mechanism comprising a dose dial element and a dose button having a proximal end face, wherein the dose dial element is rotatable relative to the main housing and the dose button,
• a cartridge holding one or a plurality of doses of a drug, and
• a cartridge holder configured to retain the cartridge,
• wherein the dose button is axially displaceable with respect to the main housing and has an actuation surface that is part of the proximal end face,
• wherein the cartridge or the cartridge holder is provided with at least one tactile component marking,
• wherein the actuation surface has a further tactile component marking, and
• wherein the at least one tactile device marking, the further tactile component marking, and the at least one tactile component marking are identical and identify the drug.