This mechanical pencil is an S20, brown, dyed with blue fountain pen ink. I'm a beginner, so it's not perfect. It's been used for quite a while, so it's deteriorated. The markings are gone, and the tip is narrow, so the lead doesn't come out. Or, there's a problem with the internal mechanism. Therefore, I recommend buying a 0.3mm tip. Also, the eraser is used up. Please refrain from purchasing if you are sensitive to these issues. If you have any other questions, please feel free to ask.