Design as value added, product as innovation.‎ Knowing to plan implies involving of all persons and sources that take part at development process.‎ The Plus Collection is born from the desire to produce an innovative product without giving up the standard grade and the functionality.‎ The creation and the subsequent invention patent of the co-axial cartridge permitted the design of a slim and harmonious shape.‎ Beloved by many.‎ Copied by many.‎