TWSBI FP Ink cartridge/cartucce

TWSBI FP Ink Cartridge

The new TWSBI Fountain pen ink cartridges are available in 3 colours:
Black
Blue
Red

Each package contain 10 cartridges.
Each cartridges contain 1,4 mm of ink

The TWSBI cartridges available on the market are actually international standard cartridges.
This means that:

• They can be used with any fountain pen that accepts international standard cartridges (for example Kaweco, Faber-Castell, Diplomat, Monteverde, and many others).

• They are available in both short and long formats, so they fit different models.

• They do not work with pens that use proprietary systems (e.g. Parker, Lamy, Pilot, Platinum), because these brands have cartridges with a different fitting.

• They are not intended for TWSBI piston or vacuum models (ECO, Diamond 580, VAC700, etc.), which can only be filled from a bottle.

In short: TWSBI cartridges are universal only for pens that support the international standard.
If you have a pen from a brand with a proprietary fitting, they will not be compatible.