Schneider Slider 755 ViscoGlide Parker-style Ballpoint Refill, Black Medium ViscoGlide provides an ultra-smooth, fast-drying writing experience Premium quality German manufacturing with wear-resistant stainless steel tip that ensures smooth and consistent delivery until the ink supply is completely used Approximately 10,000 m of writing and waterproof to ISO 12757-13 Fits all Schneider "Plug & Play" ballpoints, and all ballpoint pens using the Parker-style refill Made in Germany