--- product_id: 519881337 title: "Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens)" brand: "koomal" price: "¥3580" currency: JPY in_stock: true url: https://www.desertcart.jp/products/519881337-retractable-fountain-pen-refillable-0-38mm-extra-fine-tip-pens store_origin: JP region: Japan --- # Quick-Dry Ink Refillable Cartridges 0.38mm Extra Fine Tip Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) **Brand:** koomal **Price:** ¥3580 **Availability:** ✅ In Stock ## Summary > Write Your Legacy ✍️ ## Quick Answers - **What is this?** Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) by koomal - **How much does it cost?** ¥3580 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/519881337-retractable-fountain-pen-refillable-0-38mm-extra-fine-tip-pens) ## Best For - koomal enthusiasts ## Why This Product - Trusted koomal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile Use:** Perfect for school, office, or creative projects—your go-to pen for every occasion. - • **Eco-Friendly Design:** Refillable cartridges mean less waste and more writing joy. - • **Quick-Dry Technology:** Say goodbye to smudges and hello to crisp, clean notes. - • **Standard Compatibility:** International standard size cartridges ensure easy replacements. - • **Smooth Writing Experience:** Experience effortless writing with a glide that feels like a dream. ## Overview This Retractable Fountain Pen set includes four 0.38mm extra fine tip pens designed for smooth, quick-drying writing. Ideal for school, office, and creative projects, these refillable pens feature standard international size cartridges for easy replacement, making them both practical and eco-friendly. ## Description Features:You can replace or fill you pen conveniently, and the sufficient quantity will satisfy you various needsProper size for you: our pen ink cartridges measure approx. 2 inches/ 5.1 cm in the length, please notice that the bore diameter is 3.4 mm, which is standard international size for you to replace，Please check if the size matches the one you need before buying.Smooth write experience: this fountain pen refill slides smoothly on the paper, you will write fluently and the replace the ink cartridge can help you to save a lot of trouble; The ink takes only a few seconds to dry ensuring your important writing record are not ruined by smudgesSuitable occasions: with these short international standard size cartridges, they are suitable for daily writing use in school, office, home, you can also use them to make card, write letter, make crafts and so on; These pen ink cartridges are also fit for rewarding someone in learning progressNice gift choice: you can present this fountain pen ink to yourself as backup, you can also send to your sisters, brothers, relatives, colleagues as a gift at Thanksgiving Day, birthday, graduation, family gathering, holiday or other occasionsSpecification:Ink size: 3.4mmcolors: blue, blackspecility: this ink is erasable ## Features - this fountain pen refill slides smoothly on the paper, you will write fluently and the replace the ink cartridge can help you to save a lot of trouble - The ink takes only a few seconds to dry ensuring your important writing record are not ruined by smudges - with these short international standard size cartridges, they are suitable for daily writing use in school, office, home, you can also use them to make card, write letter, make crafts and so on - These pen ink cartridges are also fit for rewarding someone in learning progress - our pen ink cartridges measure approx. 2 inches/ 5.1 cm in the length, please notice that the bore diameter is 3.4 mm, which is standard international size for you to replace，Please check if the size matches the one you need before buying. ## Images ![Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) - Image 1](https://m.media-amazon.com/images/I/51CL4c-bs7L.jpg) ![Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) - Image 2](https://m.media-amazon.com/images/I/61+BpY5314L.jpg) ![Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) - Image 3](https://m.media-amazon.com/images/I/61BRt0SkDtL.jpg) ![Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) - Image 4](https://m.media-amazon.com/images/I/61gQvadf9CL.jpg) ![Retractable Fountain Pen Refillable, 0.38mm Extra Fine Tip, Pens for Writing School Office (4Pcs pens) - Image 5](https://m.media-amazon.com/images/I/51nWVwvjP+L.jpg) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/519881337-retractable-fountain-pen-refillable-0-38mm-extra-fine-tip-pens](https://www.desertcart.jp/products/519881337-retractable-fountain-pen-refillable-0-38mm-extra-fine-tip-pens) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-03*