Advertised under the slogan 'The Mark of Quality', the cannedversion available in the UK was initially 8.4% ABV. At one time, two bottled versions were available, one at 8.4% and the "K6" at 6.3%. The price of the 500ml can was £1.39. As of 2017, the cans' ABV was reduced to 8%, and had a reduced retail price of £1.09. As of 2020, its ABV was reduced yet again to 7.5%.
In the U.S.
A bottled version was available in the U.S. at 6.9% ABV. As of 2010, K is no longer available in the U.S. with the exception of special orders.