This MA4001-4002 25 DCU packet is the large convenient package with a mesophilic Direct Set Culture from Danisco made in France. It can be used for a variety softer cheeses and butter! Also it can be used for variety of semi-hard cheeses including Colby, Cheddar, Roquefort, Cambozola, Castello Blue, Gouda and Brick cheeses with all types of milk. Also, it is excellent for Camembert & Brie. The MA 4000 series blends both standard mesophilic lactic acid cultures plus a S. thermophilis for quicker acid production during cheesemaking. These estimates are from how they really work... The 25 dose packet will innoculate 60 gal. (1250 liters) of milk. Use 1/8 tsp. per 1-3 gallons, 1/16 tsp. per 1 gallon Contains: (LD) Lactococcus lactis subsp. diacetylactis (LC) Lactococcus cremoris (LL) Lactococcus lactis (ST) Streptococcus thermophilus Free shipping to the lower 48 states only! Extra charge to other destinations.