La Bella Strings
E.O. Mari, maker of LaBella Strings has been making strings since the mid 1600's. They are still a family owned and operated company manufacturing a large variety of strings in the U.S.A.
The treble strings of all the nylon strings we carry are made from LaBella's special high density "Nylon 202" and the basses are silver-plated, wound. The higher tension strings are great for shorter-scaled instruments with the exception of the Professional strings which are well suited to longer scales.
The steel string sets all have plain steel 1st and 2nd strings and phosphor bronze wound 3rd thru 6th strings.
A word about tension - Tension is the amount of force, usually expressed in pounds, needed to bring a string up to its intended pitch at at given scale length. A medium tension high E string on a 650mm scale guitar requires more pounds of force to be tuned to to E on a 660mm scale instrument. So, a medium tension set becomes closer to a high tension set on longer scale guitars. It's always a good idea to check with the builder or manufacturer before installing extra high tension strings on your instrument.