The flat surface of the liner's mouthpiece allows a fast milking and gives the chance to use a rather low level of pneumatic vacuum. It is appropriate for medium to heavy milking clusters and it can be used for heterogeneous udders.

The multiple ring design allows to minimize intrusions of external particles into the shell and to avoid twistings by the liner's barrel. This also allows to easily adjust the tension of the liner, according to the shell length and according to the loss of rubber elasticity.