D'Addario mandolin strings are the choice of professionals such as David Grisman, Ricky Skaggs, Ronnie McCoury, Rhonda Vincent, Mike Marshall and more. D'Addario Phopshor Bronze mandolin strings are acclaimed worldwide for their great, long-lasting tone. Phosphor Bronze was introduced to string making by D'Addario in 1974 and has become synonymous with warm acoustic tone.
Different alloys are available - here are the different guages/options:
J62 (80/20 bronze wound) .010-.034
J67 (Phospher Bronze) .011-.040
J74 (Nickel wound) .011-.039
J75 (Phospher Bronze) .0115-.041