This is the classic mandolin string, OPTIMA mandra string.
The "RED" has become the most standard string, and is often used as a shipping string, in various manufacturers mandolas.
The sound is not a habit and goes well with any mandola, so if you are in doubt, you can choose "RED".
red
For Mandra
Normal Tension
1, 2, 3, 4 strings: Winding string
1 string: 0.19 2 string: 0.28 3 string: 0.39 4 string: 0.60