TIP is a unique geometric structure to give comfortable speedy writing having enough ink to make writing with high colour intensity.

Writing units for Cello pens are being supplied from Switzerland and are being made from highly durable Nickel and Silver alloy, tips (balls) - from Tungsten Carbide.

Based on a 0.5 mm ball rotates in a socket and does not wear off. That also allowes to write under any angle.

Absolutely new development in ball point pens' production - Low Pressure High Volume ink flow system: ink with low viscosity, little pressure is applied while writing!

Feather Flo ink flow system was developed for gel pens especiallyto ensure flawless and enduring performance

Polycarbonate cap can resist an impact up to 5 kg, pen barrel - up to 3 kg!

Pens have special "grip" for better hold, which is made of antibacterial polymer, produced in USA by Santoprin (HV-65)

Ink for ball point pens is produced in Germany by Documental GmbH, who's name speaks for itself and is already a high quality guarantee. 

Gel ink for Cello pens is provided by Japanese company named "Meconi".

All-weather inks have special additives that prevent from gooping and have shelf life of at least 2 years and provide excellent performance even under extreme weather conditions. Colors are of high intensity and brightness and are water resistant - do not smear even if the water gets on paper, meet the DIN ISO 12757-1/-2 standart requirements.

EACH PEN MADE BY CELLO IS BEING TESTED IN HAND WRITING!