Dr. Grabow's Sparta, North Carolina factory, produces between 200,000 - 350,000 pipes annually, making it the largest manufacturer of pipes under one roof. It also employs 62 people, making it Sparta's single largest employer. All Dr. Grabow pipes use and accept a 6mm filter; all the pipes come "pre-smoked" - that is to say, they need no breaking in and are ready for your use from the first puff. They come in a wide variety of pleasing styles, and they will never, ever let you down. Grabow's been around for a long time - you've seen them in cornerstores and drugstores since you were a kid - but that's not only because they're affordable, but because they provide outstanding value.