On The House winemaking kit line is formulated with 6 liters of pure varietal grape juice and grape juice concentrate. The kits come complete with all the additives and yeast needed for the particular variety. Using "state of the art" aseptic, nitrogen purged packaging methods, all of the acids, pH, sugars and tannin levels are perfectly balanced and the the kits require no additional testing. Each kit yields six gallons of wine in 4 Weeks.