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£3.99
14 in stock
A plastic trial jar, overall height 25cm, used to float a hydrometer in the liquid being tested, enabling an accurate measurement to be taken.
It is graduated in 1ml units of volume from 10ml up to 100ml
?Chamber style Airlock? type fermentation trap fits bored rubber/cork bung. Half fill with water and when fitted protects the ferment by allowing a visual passing of gas pressure to escape but admits no air.