Instrument Strings
Pirastro Alto Viol String F4 20 1/2
Pirastro Alto Viol String F4 20 1/2, String For Old Gambe, F4 20 1/2, Gut with an aluminium wrap, Tuning: f
https://www.bizrate.co.uk/strings/pirastro-alto-viol-string-f4-oid9744293028.html