does this refill match a Coltex C501F?

I am not sure if this refill match the Coltex C501F. How I proceeded - I took the physical measurements of the refill I wanted to replace and its type of tip and end and took my time. Sorry I can't be more helpful. I am happy with the refill. The Jaymo advertisement says " Compatible to Ballpoint Pen Refills. You can always return it. Just be careful in your search.

Product description says 4.5 inches; technical details says 4.6 inches. which one is accurate???

4.57 in / 116.15 mm is the exact dimension. Sorry for any confusion and we will update product description to rounded number of 4.6"

Is this gel ink? I want to use these refills for check writing. If you don't use gel ink the crooks can use acetone to erase your check

Ballpoint. For gel I'd suggest the papermate ink joy...they're awesome, don't bleed, and also come in some fun colors if you don't just want blue or black.

Does Jaymo make fine tip Cross refills?

Thank you for your question. Currently we offer only the 1mm medium tip. We will look at adding a fine tip in the future.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Jaymo - 12 - Black Cross® Compatible Ballpoint Pen Refills. Smooth Writing German Ink and 1mm Medium Tip. #8513

Jaymo - 12 - Black Cross® Compatible Ballpoint Pen Refills. Smooth Writing German Ink and 1mm Medium Tip. #8513

Product ID: 399492414

Details

Brand
Jaymo
Item dimensions L x W x H
11.7 x 0.5 x
Item weight
0.1 Ounces
Number of pieces
6
Style
Ballpoint

🔩Durable metal shaft with threaded screw-in design

🖊️1mm medium tip for precise, smooth writing

🇩🇪Premium German ink ensures long-lasting flow

Description

🖋️ Upgrade your pen game with precision and style—because your ideas deserve the best.

BULK VALUE PACK - 12 refills at a fraction of the cost—never run out during your busiest workdays.
ECO SMART PACKAGING - Reusable zippered bag keeps your refills organized and ready for action.
EFFORTLESS PRECISION - 1mm medium ballpoint tip delivers clean, consistent lines for professional notes and signatures.
UNIVERSAL COMPATIBILITY - Fits Cross #8513 and multiple premium pen brands—measure once, write forever.
ENDURING INK PERFORMANCE - Smooth-flowing German ink guarantees a fade-resistant, long-lasting writing experience.

Jaymo’s 12-pack ballpoint pen refills offer a cost-effective, high-quality replacement compatible with Cross #8513 and other premium pens. Featuring a 1mm medium tip and smooth German ink, these refills provide consistent, long-lasting writing performance housed in a durable metal shaft with a threaded screw-in design. Packaged in a reusable zippered bag, they combine value, reliability, and eco-conscious convenience for the discerning professional.

Specifications

ASIN	B079RLJ33J
Best Sellers Rank	#100,684 in Office Products ( See Top 100 in Office Products ) #945 in Pen Refills
Brand	Jaymo
Brand Name	Jaymo
Customer Reviews	4.3 out of 5 stars 5,318 Reviews
Ink Color	Black
Item Dimensions	11.7 x 0.5 x 0.5 centimeters
Item Weight	0.1 Ounces
Item dimensions L x W x H	11.7 x 0.5 x 0.5 centimeters
Item weight	0.1 Ounces
Manufacturer	Jaymo
Manufacturer Part Number	90204
Number of Pieces	12
Number of pieces	12
Point Type	Medium
Point type	Medium
Style	Ballpoint
UPC	723347902041
Unit Count	1.0 Count

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