D'Addario's best selling Pro Arte set?? Normal tension offers balance of volume and comfortable resistance</br>Laser sorted clear nylon treble strings for consistent?? precise intonation</br>Precision wound basses for warm?? projecting tone and the utmost consistency</br>Made in the U.S.A. for the highest quality and performance</br>String Gauges: Trebles .0280?? .0322?? .0403 Basses .029?? .35?? .043</br></br>Product Description</br></br>Set of Six strings Musical Notes E??B??G??D??A??E -     : -----Item# -----  Diameter   ---------                Tension <ul>*J4501 - 0.028 inch (0.711mm) 15.3 lbs (6.94 kg)<ul>*J4502 - 0.0322 inch (0.818mm) 11.6 lbs (5.26 kg)<ul>*J4503 - 0.0403 inch (1.024mm) 12.1 lbs (5.49 kg) <ul>*J4504 - 0.029 inch (0.74mm) 15.6 lbs (7.08 kg) <ul>*J4505 - 0.035 inch (0.89mm) 15.0 lbs (6.80 kg) <ul>*J4506 - 0.043 inch (1.09mm) 14.0 lbs (6.35 kg)</br><br/>http://www.amazon.com/gp/product/B000EEL6J6