--- product_id: 272905299 title: "Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5" brand: "uni-ball" price: "824477₫" currency: VND in_stock: true reviews_count: 5 category: "Uni Ball" url: https://www.desertcart.vn/products/272905299-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0 store_origin: VN region: Vietnam --- # Ergonomic Rubber Grip Water & Light Resistant Ink 0.28mm Ultra Micro Point Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5 **Brand:** uni-ball **Price:** 824477₫ **Availability:** ✅ In Stock ## Summary > 🖋️ Write sharp, stay smooth — the pen that means business. ## Quick Answers - **What is this?** Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5 by uni-ball - **How much does it cost?** 824477₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/272905299-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0) ## Best For - uni-ball enthusiasts ## Why This Product - Trusted uni-ball brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Ink That Lasts:** Water and light-resistant gel ink ensures your writing stays vibrant and smudge-free all day long. - • **Ready When You Are:** Convenient retractable design means no caps to lose—perfect for on-the-go professionals. - • **Value Pack Advantage:** Set of 5 pens keeps you stocked and ready, because running out is not an option. - • **Comfort Meets Control:** Soft rubber grip designed for extended use without hand fatigue—write smarter, not harder. - • **Precision that Impresses:** Ultra-fine 0.28mm tip delivers crisp, clean lines for flawless note-taking and detailed work. ## Overview The Uni-ball Signo RT1 is a sleek, retractable gel ink pen featuring an ultra-fine 0.28mm tip for precision writing. Its water and light-resistant black ink guarantees durability, while the ergonomic rubber grip ensures comfort during long writing sessions. Sold in a value pack of five, it’s the perfect tool for professionals and students who demand reliability and style. ## Description Uni-ball Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Black Ink, UMN-155-28, Value Set of 5 Review: Great pen. Writes great, smooth, and dries fast. Interesting choice of the package though Review: I usually use a 0.38mm tip so it took me a while to get used to the 0.28mm tip but now I use it all the time. The pen writes smoothly and dries quickly. ## Features - Uni-ball Signo RT1 Retractable Gel Ink Pen, UMN-155-28 - The diameter of a lead : Ultra Micro Point 0.28mm, Color : Black Ink - Because there is no corner at the pen tip, it is not caught on paper, Smooth ink is also excellent in water resistance and light resistance - Value Pack of 5 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06Y3S2XKL | | Additional Features | Retractable | | Age Range Description | Teen | | Age range (description) | Teen | | Animal Theme | no animal theme | | Best Sellers Rank | #46,816 in Office Products ( See Top 100 in Office Products ) #1,104 in Gel Ink Rollerball Pens | | Body Shape | Round | | Brand | uni-ball | | Brand Name | uni-ball | | Closure Type | Retractable | | Color | Black | | Colour | Black | | Customer Reviews | 4.6 out of 5 stars 1,749 Reviews | | Drill Point | Ultra Fine | | Grip Type | Rubber | | Hand Orientation | Ambidextrous | | Hardness | HB | | Included Components | Ecology Sticky Notes | | Ink Base | Water | | Ink Color | Black | | Ink colour | Black | | Item Diameter | 0.28 Millimeters | | Item Dimensions | 15 x 5.5 x 2 centimeters | | Item Weight | 0.05 Kilograms | | Line Size | 0.3mm | | Manufacturer | uni-ball | | Material | Rubber | | Material Type | Rubber | | Model Name | ball point pen | | Model Number | SG_B06Y3S2XKL_US | | Recommended Uses For Product | Home, School | | Style | Modern | | UPC | 191308002770 | | Unit Count | 5.0 Count | | Water Resistance Level | Water Resistant | | Writing Instrument Form | Roller Ball Pen | | Writing instrument form | Roller Ball Pen | ## Product Details - **Age range (description):** Teen - **Brand:** uni-ball - **Colour:** Black - **Ink colour:** Black - **Writing instrument form:** Roller Ball Pen ## Images ![Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5 - Image 1](https://m.media-amazon.com/images/I/41G6JyrC6SL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by H***I on 7 April 2026* Great pen. Writes great, smooth, and dries fast. Interesting choice of the package though ### ⭐⭐⭐⭐⭐ Review *by S***K on 29 November 2025* I usually use a 0.38mm tip so it took me a while to get used to the 0.28mm tip but now I use it all the time. The pen writes smoothly and dries quickly. ### ⭐⭐⭐⭐⭐ Review *by N***K on 29 August 2025* Really great pens!! Smooth lines. I’ll be buying more. ## Frequently Bought Together - Uni-ball Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, Black Ink, UMN-155-28, Value Set of 5 - UPENOTE Gel Pens 0.28mm Extra Fine Point Pen, Black Ink, Ball Point Pen for School, Office, Stationery Supplies 6 Packs - Uni-ball Signo RT1 Retractable Gel Ink Pen, Ultra Micro Point 0.28mm, Rubber Grip, UMN-155-28, 10 Color Value Set --- ## 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.vn/products/272905299-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0](https://www.desertcart.vn/products/272905299-signo-rt1-retractable-gel-ink-pen-ultra-micro-point-0) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-04-23*