The "Dextrose Primer Pack" is used for priming a beer to get that "American Lager" effect (lower body and lower flavor without sacrificing alcohol).
200 grams (7.1 oz.)

DIRECTIONS: Dissolve in 8 fl. oz. (235mL) of boiling water. Gently stir into 6 US Gallons (23L) of beer, cider or sparkling wine coolers just prior to bottling. Creates a fine carbonation.