TWSBI ECO Plum w/ Onyx Fountain Pen《Extra Fine》 index clip Take a close look

Take a close look

Other covers may not fit properly into the Cover on Cover

Trim: Silver-tone clip and metal accents

Leak-proof

The pen cases take inspiration from the colors of February and July

TWSBI ECO Plum w/ Onyx Fountain Pen《Extra Fine》 index clip Take a close lookTWSBI fountain pens are renowned for their high quality and affordability, offering advanced filling mechanisms usually found in more expensive pens. The TWSBI ECO features a high capacity piston filler, a sleek transparent barrel that lets you keep track of your ink level, and a hexagonal screw on cap. How to use the Piston Filler Fountain pen by TWSBI: Simply unscrew the end cap, dip into ink, screw back the end cap, and your done! Ready to write!