Noodlers Clear Demo Fountain Pen with FLEX Nib New from Noodlers - Piston Fill Fountain Pens with Flex Nib! -- Noodlers Writing Instruments of the World. This listing is for one Noodlers Flex Nib Fountain Pen. This is a brand new fountain pen with a retro (60s) style and Noodlers branding bringing writing fashion and function to a new height. The nib feeds more ink as it is flexed - the auto-vent flex opens the air passage to the feed far more than a conventional nib is capable of. A light touch at 45 degrees can produce a hairline to 1.5 mm (0.0906 inches). The speed of writing with a fully flexible nib should be adjusted to suit the flow of each ink type used (some inks will flow faster than others). Slower writing may be necessary if one is writing Victorian style script vs. fine shorthand - which can be written more rapidly. Available currently in limited quantities. With piston fill, 5¼ inches long with the cap closed, manufactured from a U.S. developed celluloid derivative, with a modern [type of] nylon sealed piston. The ink compartment is windowed, and the screw-off cap and section are banded. The metal clip and the nib proudly sport NOODLERS INK. Pen comes in its own individual Noodlers box with a detailed instruction sheet.