.010 .013 .023w .033 - Set / mandolin 8-string e"e" aa dd gg with loop end E1/A2 silver steel D3/G4 silver-plated wound The Optima silver strings for mandolin impress above all with the sound of the silver-plated D- and G saw. bouquet at the end. This string is suitable for beginners, but also for advanced and professionals.