The two-stage COAX® cartridge MINI has small mounting dimensions and the three-stage COAX® cartridge MINI has high initial vacuum flow. The Pi cartridges offer high system reliability in case of fluctuating or low feed pressure and are suitable for handling sealed objects. The Si cartridges have large vacuum flow in relation to energy consumption and are good for handling porous materials or if leakage is present. The Xi cartridges is the right choice for handling sealed parts and when deeper vacuum level is needed.