Giannini Cobra Strings for Steel Acoustic Guitar Phosphor Bronze GEEFLEF (.010-.047)

SKU: 12749



The Cobra series presents all the versatility of Giannini strings. The strings for acoustic guitar Giannini Cobra GEEFLEF are coated with Phosphor Bronze, suitable for musicians who like a richier sound.

All Giannini strings are produced in Brazil, at our factory in Salto, in São Paulo.

Phosphor Bronze

Formed in its composition by 92% Copper, 8% Tin and a residual Phosphor, it is a reddish metal. In the musical strings they produce velvety, low and warm sound, with greater durability.

ISO 9001 Quality Seal

The entire line of Giannini strings has the approval of the ISO 9001quality seal. But what is the ISO 9001 seal?

ISO 9001 is a series of norms and rules that seek to guarantee the final quality of your strings. These procedures range from the choice of the raw material and its suppliers, going through the entire production process of the strings, training of the labor involved in the production, its distribution, until the product reaches the dealers and the consumer. These processes and all those involved in it undergo audits every year, to verify that they are being followed according to the established standard, so that the seal is renewed.

Since 2007, Giannini has been awarded the ISO 9001 seal in its strings line, which is renewed annually, proving the quality of each string that you use in your instrument.


  • Made in Brazil
  • Core: Steel
  • Coating: Phosphorous Bronze
  • Finish: Ball-end
  • Fingerboard lenght: 648 mm / 25 1/2″

Measurement chart

Silver Purple Green Black Red Bronze
1.E 2.B 3.G 4.D 5.A 6.E
A inch. 0.010 0.014 0.023 0.030 0.039 0.047
mm. 0.25 0.36 0.58 0.76 0.99 1.19