Giant metal refill in ISO format G1 Blue ink Medium (M) line width, 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 Compatible with the Express 75 and Office 575 refills: Papermate PHD Ultra and Aspire ballpoint pens and many others Listing is for 3 refill's .
eBay