Sheaffer Vac Fil Front Plunger Seals red ink These are "DIPPLESS PEN POINTS"

These are "DIPPLESS PEN POINTS" meaning they are for pens with self contained ink supplies

illustrations and ephemera

Cleaning would typically be done by puncturing the front end with the puncture tube of a pen that it fits

only a lot of well over 100 photos of very nice desk sets

Sheaffer Vac Fil Front Plunger Seals red ink These are "DIPPLESS PEN POINTS"FRONT PLUNGER SEALS FOR SHEAFFER VAC FIL FOUNTAIN PENS (for the FRONT END OF PLUNGER, AS OPPOSED TO REAR PLUNGER SHAFT SEALS). Sold in sets of 10 by size or as an assortment pack with 2 of each size. These come in 3 sizes with the following APPROXIMATE diameters, very close to what Sheaffer used: Small: approx. 9 32" (7mm) Medium: approx. 5 16" (8mm) Over Sized: approx. 3 8" (9. 5mm)