Hi! What is the capacity of the standard long Waterman cartridges in ml?

The long cartridges are 72 mm in length with about 1.45 ml capacity.

This fits all Waterman pens, so what's the difference from standard so110850 Waterman cartridges, much cheaper?

This did NOT fit my Waterman pen. It was too long. So I'm afraid I can't answer your question properly. Sorry.

Would the cartridges fit in this fountain pen https://www.amazon.com/fountain-ideapool-calligraphy-signature-executive/dp/b01m1fuxun/ref=pd_sim_229_5?

I'm not sure but I don't think so. They look different

Does these fit pilot pens

Most likely not. I believe they are brand specific. These are very large tubes that fit the waterman nicely. there are smaller tubes S0194751 by Rotring that I have purchased on Amazon. They come at a very low cost with many units and work great for smaller reservoir pens. The pack is 6 per box and you can buy multiple boxes at one time to save more money. If you use your fountain pen a lot that would be my recommendation.

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Waterman Ink Refill Cartridges For Fountain Pens, Black, 8-Pack (S0712991)

Product ID: 256859099

Details

Brand
Waterman
Item dimensions L x W x H
7.7 x 6 x 1.2
Item weight
0.22 Grams
Number of pieces
8
Style
Long

🖤intense classic black shade

⚙️universal Waterman compatibility

🖋️8 premium ink cartridges

R687

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Description

🖋️ Elevate your pen game—because your words deserve the best.

LEGACY OF ELEGANCE - Intense black ink that’s been the choice of discerning professionals for generations.
BULK PACK ADVANTAGE - 8 cartridges per pack to keep your creativity flowing without interruption.
TRUSTED BY THOUSANDS - 4.6-star rating from over 6,000 users who refuse to settle for less.
PERFECT FIT EVERY TIME - Designed to seamlessly fit all Waterman fountain pens—no hassle, just ink.
EFFORTLESS WRITING FLOW - High-quality formula ensures smooth, consistent strokes for superior writing comfort.

Waterman Ink Refill Cartridges deliver a rich, intense black ink in a convenient 8-pack, compatible with all Waterman fountain pens. Crafted for smooth writing and lasting performance, these cartridges are a trusted choice among professionals and fountain pen enthusiasts alike.

Specifications

ASIN	B000J3X9XS
Best Sellers Rank	#15,573 in Office Products ( See Top 100 in Office Products ) #45 in Bottled Ink
Brand Name	Waterman
Customer Reviews	4.6 4.6 out of 5 stars (6,340)
Included Components	Ink Cartridge
Ink Color	Black
Item Dimensions	7.7 x 6 x 1.2 centimeters
Item Weight	0.22 Grams
Manufacturer	Waterman
Manufacturer Part Number	S0712991
Model Number	S0712991
Number of Pieces	8
Package Size Name	Blister pack of 8
Point Type	Medium
Style	Long
UPC	844998178613
Unit Count	8 Count

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R687

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In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

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