This auger can rotate left and right, so that dosing can be done from 2 outlets. Below one outlet is a pneumatic valve, so that this outlet can be closed between doses. In this way, ‘leaking’ of product is minimized. If the motor starts to run the other way around, dosing is done via the other output. This is very easy to change between different products, for example. The funnel with auger can be easily emptied via this second exit.