The material can be fed into a form, formwork or main line. Depending on the density, mobility of the material being fed, the number of bends in the sleeve, the feeding range and productivity change. It is often used in conjunction with a container or mixer. The connection neck can be made individually according to the Customer's requirements. The sleeve and connections are additionally equipped, depending on the feeding range. It can also be equipped with a frequency converter for adjusting the feed speed.