Can these pens be refilled with my own ink? Like other calligraphy pens that have a refill attachment you can fill with your own ink.

They can be made into eyedropper fill pens. The used cartridges can also be refilled carefully with a syringe (this is what I do), but if you are asking about the thing that looks like a converter, it isn't really one. It is just to clean the pen and does not fit snugly enough to use that way.

Is cartridge ink waterproof?

I am NOT sure if the ink is waterproof; If it is NOT on the package; then its absolutely NOT WATERPROO.

What convertor can I use with these pens? I don't' want to have to buy refill cartridges.

This one. Pilot Fountain Pen Converter (CON-50) https://www.amazon.com/dp/B0016YWJZ8/ref=cm_sw_r_cp_apa_MIIhzbDSPNCP8

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Pilot Parallel Calligraphy Pen Set, 2.4mm Nib with Black and Red Ink Cartridges (90051)

Product ID: 4258067

Details

Age Range (Description)
Ages 13+
Brand
PILOT
Color
Red/Blue
Ink Color
Assorted
Writing Instrument Form
Fountain Pen

🎨Mix & match inks for custom ombre effects

♻️Refillable cartridges for sustainable creativity

✒️2.4mm dual-plate nib for sharp & expressive lines

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Rp416283

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

✍️ Elevate your script game with the pen that blends precision and personality!

ECO CHIC WRITING - Refillable design reduces waste while keeping your pen performance fresh and vibrant.
COLOR YOUR CREATIVITY - Easily blend black and red inks or swap cartridges to craft unique, eye-catching gradients.
PRECISION MEETS ARTISTRY - Innovative dual parallel plates deliver razor-sharp calligraphy and bold strokes in one pen.
VERSATILE FOR EVERY PROJECT - Perfect for bullet journaling, hand lettering, and professional calligraphy with a smooth, comfortable grip.
TRUSTED LEGACY MODERN FLAIR - Backed by over 100 years of Pilot’s pen expertise, ensuring reliability and premium quality.

The Pilot Parallel Calligraphy Pen Set features a revolutionary 2.4mm nib with dual parallel plates that enable both sharp monoline and expressive broad strokes. Included are black and red refillable ink cartridges, a pipette, and a nib cleaner, allowing for seamless ink blending and sustainable use. Ideal for calligraphy enthusiasts and bullet journalers seeking professional-grade tools backed by Pilot’s century-long craftsmanship.

Specifications

ASIN	B002RJLS0S
Additional Features	Blendable, Refillable
Age Range (Description)	Ages 13+
Age Range Description	Ages 13+
Best Sellers Rank	#9,274 in Office Products ( See Top 100 in Office Products ) #5 in Calligraphy Pens #63 in Drawing Pens
Body Shape	Round
Brand	PILOT
Brand Name	PILOT
Closure Type	Retractable
Color	Red/Blue
Customer Reviews	4.6 out of 5 stars 5,847 Reviews
Drill Point	2.4mm
Global Trade Identification Number	00072838900517
Grip Type	Smooth
Included Components	Parallel Pen, Black Ink Cartridge, Red Ink Cartridge, Pipette, Nib Cleaner
Ink Base	Water
Ink Color	Assorted
Item Dimensions	7.83 x 2.5 x 0.63 inches
Item Type Name	Pilot Parallel Calligraphy Pen Set 2.4mm Nib - Black & Red Ink
Item Weight	0.8 Ounces
Line Size	2.4mm
Manufacturer	Pilot Pen Corporation of America
Material	Plastic
Material Type	Plastic
Model Name	Pilot Parallel Calligraphy Pen Set 2.4mm Nib - Black & Red Ink
Model Number	90051
Recommended Uses For Product	Calligraphy
Style	2.4mm Nib
UPC	072838900517
Unit Count	1 Count
Warranty Description	No Warranty
Water Resistance Level	Not Water Resistant
Writing Instrument Form	Fountain Pen

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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