Amount of mass lost during stable Case B mass transfer for all models where this is encountered, as a function of the maximum radius the star would have exhibited in this phase without a companion (i.e., the maximum radius of the model N2818−0.95) minus the Roche lobe radius prior to interaction. Different colors represent different initial orbital periods, as in Fig. 2, and the dashed lines connect systems with the same initial mass ratio, whose value is labeled on the left.