At GHS we ship our product in the United States directly to the dealers. We also do not require a minimum order, which allows our dealers to keep fresh product on hand. There really isn't a good measurement for this. There are so many variables involved that it makes it impossible to tell. Most players know for themselves how long a good set of strings will last them.
Every person has different playing styles, body chemistry, instruments, and playing environments.
The tone quality of this string is very bright with a great deal of sustain. It is great for guitars that are traditionally very deep sounding that the player wants to brighten up. It is also a very gentle string to the fingers. This product will be available at dealers sometime in February, 2000. We are always in the process of looking for product improvements and innovations.