O-rings for eyedropper pens

O-rings for eyedroppering fountain pens
[9mm external diameter, black nitrile rubber]

Use an o-ring to convert your fountain pen into an eyedropper pen!

Silicone grease is recommended to help ease the o-ring onto the pen barrel/section, as well as to provide an additional barrier of protection against ink leakage.

This size o-ring is ideal for eyedropper converting the following fountain pens: Platinum Preppy, Platinum Meteor, Platinum Plaisir, Platinum Prefounte, Jinhao Shark, Pilot Parallel, Pilot Penmanship, Pilot Prera, Noodler’s Ahab, Kaweco Sport.

When reassembling the pen after adding the o-ring, be cautious not to over-tighten the pen parts and cause stress fractures.