Lamy M21 Ballpoint D1 Refill
- Length: 66.7mm (2.625″)
- Manufacturer’s website: Lamy
The Lamy M21 ballpoint refill matches the multifunction (D, D1) standard. It will fit in some Lamy ballpoint pens as well as most other pens designed to take a D1 refill. This refill is available in black, blue, red, or green ink. Numerous pen and/or refill makers offer substitutes for this refill in various colors.