Choosing among converters, cleaning & pen cases starts with a basic question: do you need an ink accessory for one fountain pen, or a case that keeps a collection organized and visible? The Fountain Pen Ink Converter Screw Type (CON-40 and the Wood Fountain Pen Display Case 34 Slots Holder Storage Collector Box Organizer serve entirely different jobs. The useful decision is to match the item to your immediate need, then consider the listed price and the limitation that comes with each choice.
Quick verdict
Choose the CON-40 when you need the screw-type converter named in its title for the single-cartridge Pilot fountain pen use described. Choose the wood case when display and storage are the priority. This is a function-first comparison rather than a performance contest: one item handles ink conversion, while the other organizes pens.
Listed-price and role comparison
| Product | Listed price | Main job |
|---|---|---|
| Fountain Pen Ink Converter Screw Type (CON-40 | $9.95 | Screw-type ink converter |
| Wood Fountain Pen Display Case 34 Slots Holder Storage Collector Box Organizer | $43.95 | Wood display and storage case |
| Price spread | $34.00 | Different roles, not like-for-like alternatives |
Where each product wins
- Fountain Pen Ink Converter Screw Type (CON-40: It wins when the stated single-cartridge Pilot fountain pen use is the match you need. The focused converter format avoids paying for storage features that do not address an ink-filling task.
- Wood Fountain Pen Display Case 34 Slots Holder Storage Collector Box Organizer: It wins for collection organization. Its description specifies three layers and room for up to 34 pens, giving the case a clear display-and-storage purpose.
Product notes
Fountain Pen Ink Converter Screw Type (CON-40

The Fountain Pen Ink Converter Screw Type (CON-40 is the focused choice when you need an ink accessory rather than storage. Its description identifies a screw-type format for a single-cartridge Pilot (Namiki) fountain pen and 0.4 ml of ink, while the attributes specify one piece. That creates a concrete use case: matching the stated converter format to that pen. The limitation is scope: one piece handles one converter need, not a collection-management job, and the listed 2.8 x 0.3 x 0.3-inch dimensions describe a narrow component rather than a case. Choose it when the CON-40 wording matches your pen; its dedicated format is not a substitute for a pen organizer.
Wood Fountain Pen Display Case 34 Slots Holder Storage Collector Box Organizer

The Wood Fountain Pen Display Case 34 Slots Holder Storage Collector Box Organizer is the storage-led choice. Its description specifies wood and flannel construction, a transparent top, and three layers, so it gives a collection a display-oriented home. The black color is also listed. That is the concrete reason to choose it: the case combines visible presentation with organized storage in the role named by its title. Its limitation is equally clear: it is not an ink converter, and the package says pens are not included. The listed 31 cm length, 21 cm width, and 12.5 cm height also make its physical footprint relevant before you assign it a shelf or desk. Choose it for storage and display, not for filling a pen.
Final choice by use case
- For a single fountain pen needing an ink accessory: Choose the CON-40 because its title specifies a screw-type converter and its description names a single-cartridge Pilot use.
- For organizing pens for display: Choose the wood case for its transparent top and three-layer design.
- For the more focused purchase: The converter is the direct choice for an ink-conversion task; the case is the direct choice for storage and presentation.
The two items serve distinct roles, so the right choice follows the job. Match the CON-40 to the stated pen use, or choose the wood display case when organized visibility matters more than ink filling.