Refills for Diplomat pens are either ballpoint or rollerball, and will be compatible across the full range, apart from the Spacetec refill, which will only fit their Spacetec range of pens.
If you are unsure which one you need, try and match the old pen refill to the product photo, or check out the product descriptions for more guidance on which pens will fit.
A diplomat rollerball refill that can fit all modern Diplomat rollerball pens.
A Diplomat ballpoint refill designed to fit all modern Diplomat ballpoint pens.
A Diplomat ballpoint refill designed to fit all modern Diplomat ballpoint pens.
Gas pressurised ballpoint refill by Diplomat Spacetec with a medium blue point.
