• For Violin I and II
• for Viola II + III
• for Cello III + IV
• for Double Bass V und VI

Basically: for solo playing the harder of the two specified hardness is preferred!

Before the first application of Liebenzeller Metal Rosin we recommend:

Clean your bow with a soft cloth and apply initially to little rosin! Likewise, if you apply another rosin varieties - so the difference is apparent.