red label premium Viola sets
Model Number	Strings	Make	Size	Gauge	Tension
4907	A, D, G, C	Chromium	Standard (15-16 1/2”)	Medium
red label Premium viola single strings
Model Number	Strings	Make	Size	Gauge	Tension
4917	A	Nickel	Standard (15-16 1/2”)	Medium	19.1
4927	D	Chromium	Standard (15-16 1/2”)	Medium	16.9
4937	G	Chromium	Standard (15-16 1/2”)	Medium	13.6
4947	C	Chromium	Standard (15-16 1/2”)	Medium	13.7