This large postable pen is an eyedropper-filled pen with a piston operated shut-off valve. It has a silver stainless steel #6 JoWo nib and includes a glass eyedropper to fill the pen with your favorite ink.
An ebonite piston and rubber gasket seals the feed off from the barrel when fully depressed, reducing the risk of leakage and burping. By unscrewing the blind cap and loosening the rod at the rear of the barrel, you open up the ink flow to the feed. During long writing sessions, leave the shut-off valve open to take advantage of the impressive ink capacity. Having a completely clear pen body allows you to see both your current ink level and your nib while capped.