Microliters
Microliters are a unit of volume in the metric system used to measure very small amounts of liquid. One microliter is equal to one millionth of a liter. This tiny unit of measurement is often denoted by the symbol μL. To put it into perspective, a single drop of water is roughly equivalent to about 50 microliters.
US Liquid Barrels
A US liquid barrel is a volume unit used in the United States to measure the volume of liquids. One US liquid barrel is equivalent to 31.5 US gallons or about 119.24 liters.
To convert this unit please visit: US liquid barrel conversions.
Note that there are many types of barrel so be sure to choose the correct one for your needs.