This is a great tool to more conveniently measure your Specific Gravity or Brix % when home brewing. When using a hydrometer, you need to get a trial jar sample of wort from your boiler when it is near boiling and then wait for the wort to cool before getting a reading. With the refractometer you only need to take a small sample using a spoon or pipette straight from the Grainfather and only wait a few seconds before dropping a very small sample on to your refractometer. Easier to use and more accurate. Brix scale: 0 to 32%. Wort SG: 1.000 - 1.120 Comes in a plastic hard case. Includes an adjustment screwdriver, pipette, Lens cloth and instructions. Colour and design may change.