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In page Bock:

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Traditionally Bock is a sweet, relatively strong (6.3–7.6% by volume), lightly hopped lager registering between 20 and 30 International Bitterness Units (IBUs).[1] The beer should be clear, with colour ranging from light copper to brown, and a bountiful, persistent off-white head. The aroma should be malty and toasty, possibly with hints of alcohol, but no detectable hops or fruitiness. The mouthfeel is smooth, with low to moderate carbonation and no astringency. The taste is rich and toasty, sometimes with a bit of caramel. The low-to-undetectable presence of hops provides just enough bitterness so that the sweetness is not cloying and the aftertaste is muted.[citation needed]