Ortega ATG44NH Atmosphere Green Classic Guitar Strings; hard tensionORTEGA Guitars Atmosphere Green strings are created and manufactured in Italy. By replacing traditional oil based treble strings with a newly developed nylon material, made from 100% plant-based products, ORTEGA Guitars sets a new standard for an environmentally friendly future for guitar string production. During the production process, carbon emissions are reduced by more than 50%. This is our small but important contribution to a cleaner and greener planet. This newly developed string material delivers a perfect combination of clarity and warmth, a punchy tone, incredible projection, precise intonation, and long-lasting tuning stability.6th E: wound, 1.08 mm, .043" 5th A: wound, 0,90 mm, .035"4th D: wound, 0,70 mm, .028"3rd G:1.04 mm, .041"2nd H: 0,84 mm, .033"1st E: 0,74 mm, .029"