These A-Alto Viol gauges assume a vibrating string length of 48cm. A-Alto Viol e-2 Gut Gauges Light 0.70mm Light+ 0.72mm Medium 0.74mm Medium+ 0.76mm Heavy 0.78mm Heavy+ 0.80mm String Length: Single-Length, 48"/120cm String Type: Treble Gut String Material: Beef Gut String Options: Ball Ends, Varnish Tuning Designation: a=415 Treble Gut is processed to be a little harder than the other kinds of gut. The string also has a lower twist of about 15 degrees. This construction gives it the strength and resistance it needs to stand the strain in the treble register. The color ranges from clear white to opaque yellow. The string comes with plain, unknotted ends. A 3-D Printed Ball End may be added for an additional charge. Instructions on how to tie a string knot are on the back of each package. Plain gut strings are available with a natural or varnish finish. Natural strings are hand-rubbed with a light oil. Varnished strings have three coats of finish before being hand-polished with the oil. Tuning ConsiderationsGamut Academie Gut Alto Viol Strings are designed for Baroque instruments by those musicians playing historical performance practice at a=415, and are perfectly suitable for modern a=440 practice, but the result will be a little bit more tension at a=440. Technical ConsiderationsBeef gut (beef serosa) has a higher tensile strength than does sheep gut, so this string is useful for instruments that require extra durability. If your instrument has a longer string length which puts it beyond the comfortable range for sheep gut strings, the beef gut would be a good choice for string selection as it will stand the strain a little better. These are our standard recommended gauges for this instrument/string. For gauges outside of this range, see our Custom Gauged Strings section. All Gamut string set prices are based off of the individual string prices; there is no penalty for ordering strings à la carte. Further ReadingViola da Gamba / ViolsEarly Music / Historically Informed PerformanceHistorical String-Making Care and Cleaning of Gut Strings String Calculator