Martin Guitars MTR13 Retro Bluegrass Tony Rice

Guitar strings for acoustic steel-string guitar - Martin Guitar Retro Bluegrass Tony Rice - MTR13 Strings with retro sound in legendary alloy!
The Retro model has Plain steel strings, but the spun strings are made of Martin's classic Monel alloy of Nickel and Copper, just as it was in the 1930s. The alloy is naturally resistant to corrosion, which gives strings that hold their tone for a long time.
The strings have a less prominent touch that allows the guitar's natural sound and tone to come through in a fantastic way.

Common question
Do Martin Guitar strings fit on guitar brands other than Martin Guitar?
Answer: Absolutely, you can use Martin strings on acoustic guitars of other brands without any problems!

Retro MTR13 includes:
E: 013
B: 016
G: 026 Spun
D: 034 Spun
A: 044 Spun
E: 056 The Spun
 
Specifications:
Model: Bluegrass Tony Rice
Spun strings in an alloy of Nickel & Copper
Plain steel strings
Tension 184.8 lbs
Manufacturer's Part No. MTR13