Here's more from D'Addario:

EJ70, D'Addario's mandolin set featuring ball ends rather than standard loop ends are ideal for all mandolins requiring ball ends. EJ70's contain the E and A strings from a medium gauge mandolin set with the slightly lighter D and G strings from a light gauge set. Phosphor Bronze construction provides an ideal balance of warmth, brightness and overall balanced tone. D'Addario mandolin strings are trusted by legends like David Grisman, Ricky Skaggs, Ronnie McCoury, Doyle Lawson, Rhonda Vincent, Mike Marshall, Adam Steffey, and more, for their natural acoustic tone and reliable performance. They are made from the highest quality plain steel, stainless steel, nickel plated steel and phosphor bronze and are available in a wide variety of gauges. 

• For use on all mandolins requiring ball end, rather than loop end strings
• Light-medium gauge
• Environmentally friendly, corrosion resistant packaging for strings that are always fresh
• Made in the U.S.A. for the highest quality and performance
• String gauges: Plain Steel .011/.011, .015,.015, Phosphor Bronze Wound .024/.024, .038/.038