100ml glass bottle of a citric acid based flux which has a very low odour when soldering. Also know as Safety Flux, it's primary ingredient is Citric acid. I developed this for people who are susceptible to Phosphoric acid fumes, be it Asthma, other breathing difficulties, or just find the smell unpleasant. Works just as well as Phosphoric acid but without the fumes/smell. As the post office are unwilling to accept such products, this item will be shipped via a courier at no extra cost, unless in the far reaches of Scotland. Shipping abroad is at cost and at buyers risk.