Giant refill with Viscoglide® technology for smooth and gliding writing. ISO format G2. Writing colour black. Medium line width (M). Waterproof according to ink standard ISO 12757-2. The wear-resistant stainless steel tip guarantees that the large ink supply can be fully used and does not smear. The ink dries quickly – even on smooth paper – and is smudge proof when highlighting it later on. Fits all Schneider Plug+Play ballpoint pens as well as many other pen types.