Peter Infeld viola strings Perfect blend of power and elegance, rich spectrum of tone and dynamics. Perfect for "dark" sounding instruments Medium tension for 4/4 Alto with 370mm / 14 1/2 scale tuning A string: steel core, chrome thread, removable ball, Rope Re: synthetic core, chrome thread, G string: synthetic core, silver thread Average tension 5.6kg / 12.3lbs C string: synthetic core, chrome thread Average tension 5.6kg / 12.3lbs