Period age relations as function of different initial rotation rate and metallicity, averaged over 2nd and 3rd crossing and the width of the instability strip. The cyan lines show PA-relations from Bono et al. (2005) for similar metallicities (Z = 0.02,0.01,0.004) plotted for a fixed log P range. Our models are shown only for the period-range accessible from the computed models. Non-rotating models are shown in red, average rotation in black, and fast in blue.