.066 There is 1 product.

A folk guitar string purchased individually with a tension of .66 may be a light gauge folk guitar string. Guitar strings are generally classified according to their tension in terms of "gauge", which is defined in terms of mass in units of measurement such as inches or millimeters. Light gauge strings are often used for acoustic guitars for their brighter, more playable sound, but they can also be less durable than heavier strings. It's important to note that string tension also depends on how the string is tuned and the length of the guitar's scale.