Abstract: A cartridge holder is capable of receiving a first type of cartridge and a second type of cartridge containing viscous material. The cartridges of the first type are different in size from the cartridges of the second type. The cartridge holder has a distal stop for receiving a dispensing end of the cartridges and a proximal receptacle for receiving a rear end of the cartridges. The receptacle is located opposite to the distal stop along a longitudinal axis of the cartridge holder and is movable along the longitudinal axis as well as spring loaded towards the distal stop. Furthermore, the receptacle is configured to contact the rear end of the first type of cartridges at a smaller distance from a rear end of the receptacle than the rear end of the second type of cartridges.