Instrument Strings
Pirastro Treble Viol String C4 18 3/4
Pirastro Treble Viol String C4 18 3/4, Treble Viol String, C4 18 3/4, Material: Intestine / aluminium, Tuning: c'
https://www.bizrate.co.uk/strings/pirastro-treble-viol-string-c4-oid9421574309.html
