Is this compatible with lamy, parker or any other fountain pens? is it a specific standard or does it fit only hongdian?

Its diameter is 3.4mm, which is suitable for the pen with 3.4mm ink cartridgs. It can also help the ink converter of the pen to fill the ink. You can see the video of the product details page for the specific usage.

Can these be used to remove ink from a cartridge to put into a fountain pen converter. For instance when you have cartridges that don’t fit your pen.

Yes they can, absolutely ideal for doing it, but you may need someone to hold the items you are transferring from/to, as it’s slightly awkward doing it one handed, till you get used to doing it, the only warning I have when you are transferring the ink into the converter, do it very slowly, or you will end up with very inky hands .

can these be used to refill disposable ink cartridges?

Yes, just clean your empty cartridge first. Make sure when inserting the filled cartridge into the pen that the open end of the cartridge is pointing upward of course!

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Asvine 5 Pack Fountain Pen Ink Syringe Filler, Spring Converter with Removabl...

Product ID: 246799426

Details

Brand
Asvine
Item weight
0.02 Kilograms
Number of pieces
5
Point type
Fine
Style
Fountain

🔧easy 3-part assembly

⚙️spring-loaded ink draw

🖋️3.4mm converter fit

¥1992

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖋️ Elevate your writing game—never run dry or miss a stroke!

DURABLE RELIABLE - Lightweight yet sturdy design with a 3-month warranty for professional-grade performance.
EFFORTLESS ASSEMBLY - Three-part design with connector and removable needle for quick setup and maintenance.
BULK PACK CONVENIENCE - Five syringe fillers in one pack to keep your pens ready and your workflow uninterrupted.
PRECISION INK TRANSFER - Spring-loaded mechanism ensures smooth, mess-free ink filling every time.
UNIVERSAL COMPATIBILITY - Fits all fountain pens and 3.4mm converters like Hongdian for ultimate versatility.

The Asvine 5 Pack Fountain Pen Ink Syringe Filler features a spring converter compatible with 3.4mm fountain pen cartridges, including Hongdian models. Designed for easy ink filling and flushing, it includes a removable blunt needle tip and a simple three-part assembly. Lightweight and durable, this set offers professional-grade precision and convenience in a bulk pack, backed by a 3-month warranty.

Specifications

ASIN	B08LLFVQVV
Best Sellers Rank	6,638 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 1,199 in Pens, Pencils & Writing Supplies
Brand Name	Asvine
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (2,986)
Ink Colour	White
Item Weight	0.02 Kilograms
Manufacturer	Asvine
Manufacturer Part Number	AS5SPCV5784HV
Model Number	AS5SPCV5784HV
Number of Pieces	5
Package Size Name	5 Pack
Point Type	Fine
Product Warranty	3 Months
Style	Fountain
Unit Count	5 count

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