The TWSBI ECO fountain pen boasts an incredible value with its piston filling system and affordable price. Like many other TWSBI fountain pens, it features a crystal clear acrylic barrel so you can see your ink level, and a solid cerulean blue cap and piston knob. The pen cap has an inner cap to ensure a perfect seal when stored away. It is completed with silver trim and a silver stainless steel nib.
TWSBI's belief is that it is important to allow the user to disassemble and reassemble the pen and completely experience the traditional aspects of owning and using a fountain pen. These pens also come packaged with a wrench and silicone grease. Neither of these accessories are intended to be used immediately, as they are for long-term care and maintenance. Additionally, please use extra care if you choose to disassemble the nib and feed, as the feed is very fragile.
- Condition
- New
- Brand
- TWSBI
- Type
- Fountain Pens
- Color
- Blue, Clear
- Demonstrator
Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.
- Yes
- Body Material
- Resin
- Cap Rotations
For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.
- 1
- Cap Type
How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).
- Screw-cap
- Compatible inks & refills
Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.
- Bottled ink
- Filling Mechanism
How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.
- Piston
- Grip Material
- Resin
- Nib Size
- Extra-Fine, Fine, Medium, Broad, 1.1mm Stub
- Nib Color
- Silver
- Nib Material
- Steel
- Postable
Whether or not the cap fits securely onto the back of the barrel when open.
- Yes
- Retractable
Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).
- No
- Diameter - Body
- 12.8mm (0.50in)
- Diameter - Cap (without clip)
- 14.9mm (0.59in)
- Diameter - Cap (with clip)
- 17.3mm (0.68in)
- Diameter - Grip (mm)
Measured from the place most people choose to rest their fingers, which varies with each pen.
- 9.1mm
- Length - Body
The measurement from the back end of the barrel to the tip of the nib.
- 131.6mm (5.18in)
- Length - Cap
- 60.4mm (2.38in)
- Length - Nib
The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.
- 18.5mm (0.73in)
- Length - Overall (Closed)
- 138.8mm (5.46in)
- Length - Overall (Posted)
When the cap of the pen is posted onto the back of the pen body, this is the measurement of the entire pen including the nib.
- 167.5mm (6.59in)
- Weight - Body
If a converter is included with the pen, this weight is reflected in the total.
- 13g (0.46oz)
- Weight - Cap
- 8g (0.28oz)
- Weight - Overall (g)
- 21.0g
- Max Ink Capacity - Piston Vac
The maximum volume of ink that can fit in the pen when using the built-in piston or vacuum filling mechanism.
- 1.76ml
