I believe that it will fit and its regular lead. I bought some leads from Levenger that not only fit but was cheaper than PSI's or CS. They also have a high lighter lead that can be erased, it comes in a couple colors and it works. I made pens for my Son and my Wife because they both use high lighters quite a bit and they liked them very much. Also Levenger does not charge shipping for lead or ink refills.
Wayne