4 Pack - Schmidt P950 MegaLine - Black Ink Schmidt MegaLine Gas Pressurized Refill. This is really cutting edge refill technology. Writes in Extreme Conditions without any problems and with Unlimited Shelf Life! Fits all types of pens that use Parker style refills. Refill Reads: Schmidt MegaLine P950 Length - 3.84 inch (97.5 mm) Made in Germany - Distributed by Lanier Pens - USA, Ensure TOP Quality product - buy direct from Distributor!