Ballpoint pen refill, 337 B, black, pack of 6.

The Pelikan 337 ballpoint refill is the most well-known in the range. You can insert this refill in any Pelikan biros. This ballpoint refill is available in blue and black. You can choose from various writing line thicknesses. The Pelikan 337 ballpoint refill is very reliable and has a long service life.