Properties of unresolved binary WD pairs with G < 20 for our standard model. Shown are double He WDs (circles), double CO WDs (squares), CO+He systems in which the He WD is the brightest (upward pointing triangles), He+CO systems in which the CO WD is the brightest (downward pointing traingles), pre-WDs (filled stars), and “other” stars, which are pre-WDs that are indistinguishable from MS stars or giants. After the label discriptions in the legend, the total number of WD binaries of that particular kind is given. Due to the low number of halo WDs with G < 20 we expect to find in the Milky Way, there is some statistical noise in this figure.