viola string set, 33/37 cm., light, consists of CO-831-L, CO-832-L, CO-833-L and CO-834-L
viola string D-2, 33/37 cm., light, stabilon, aluminum-alloy
viola string C-4, 33/37 cm., light, stabilon, tungsten-alloy
viola string D-2, 33/37 cm., heavy, stabilon, aluminum-alloy
