Instrument Strings
Pirastro Treble Viol String D1 10 1/2
Pirastro Treble Viol String D1 10 1/2, Treble Viol String, D1 10 1/2, Material: Gut, Tuning: d"
https://www.bizrate.co.uk/strings/pirastro-treble-viol-string-d1-oid9421581791.html