These 'zero gravity' black ink cartridges are Schmidt™ P950 MegaLine Pressurized Parker Style Medium Ballpoints, able to write at any angle and in extreme hot and cold conditions. This top-of-the-line cartridge uses a special thixotropic ink paste with a nearly unlimited shelf life, and is measured by the EWIMA, (European Writing Instrument Manufacturer's Association), to write up to 8000 meters. (That's about 5 miles). Packaged with (3) cartridges, these are perfect for pen turners, collectors, or spares for your own pens. Fits pens that take Parker refills.
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