11.5g sachet of top quality Ale yeast (Saccharomyces cerevisiae). This well-known English Ale strain exhibits fast fermentation with unique sedimentation properties, helping to improve beer clarity. In the recommended temperature range of 18ºC - 24ºC, the Safale S-04 will attenuate the wort down to 1008-1012 within 2 or 3 days. Please note: DCL Yeast provide useful information about their yeasts on their website. Use this link http://www.dclyeast.co.uk/DCL_Main/main_brewing/homebrew_index.htm to reach the appropriate area.