Type...Ballpoint pen Ink...Oil-based Features...Single color Body material...Plastic Other features...Bulk sale Nine green Staedtler ballpoint pens. All have only been used for test writing and are almost unused. I confirmed that the ink comes out by test writing. The contents are as follows: Staedtler stick 430 F-3 Fine (0.5 equivalent?) 8 pens, yellow barrel Staedtler stick 430 M-3 Fine (0.7 equivalent?) 1 pen, clear barrel