This is a dual unit spring scale that can measure weight in grams and force in Newtons. This scale comes in six different sizes as described in the table below.
Color Coded Scales included in this set are:
|Blue:||0 N to 2.5 N||0 Grams to 250 grams|
|Green:||0 N to 5 N||0 Grams to 500 Grams|
|Brown:||0 N to 10 N||0 Grams to 1000 Grams|
|Red:||0 N to 20 N||0 Grams to 2000 Grams|
|White:||0 N to 30 N||0 Grams to 3000 Grams|
|Yellow:||0 N to 50 N||0 Grams to 5000 Grams|
Newton units are used when you want to measure a force. Grams are used when you are measuring a weight.
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Exactly what I needed at a great price and arrived very quickly.