The Spirmix L diet feeders 15 – 17 m3 are equipped with an axle located in the tank to provide a very low overall height and a perfect manoeuvrability, the mixer feeders are fitted with vertical stepped augers that brew and aerate the mixture; they can feed about 80 to 115 dairy cows per pass. The rolled tank of the mixer feeder gives various advantages, it reduces the power required for making a mixture; the flared and smooth shape makes the ration homogeneous more rapidly.