Thomastik-Infeld Strings For Viola Rondo Gold - G Synth./Silver (RG23)RONDO Viola Gold strings, great dynamics, deep tone colour, excellent bow response Compared to regular RONDO strings, RONDO Gold strings sound significantly warmer, but also more radiant The strings respond very well across the entire dynamic range (ppp to fff) and can also be used at 430 hertz Medium tension A string: RG21 carbon steel core, chrome wound, 8. 2 kg 18. 1 lbs D string: RG22A synthetic core, chrome silver wound, 6. 3 kg 13. 9 lbs G