Uni has released the popular SXR-80 refill in environmentally-friendly, paper packaging!  Mitsubishi Jetstream Multi Refill in your choice of .38, .5, .7, or 1.0 tip size and Black, Blue, Red, and Green ink colors. (Green ink not available in 1.0 mm.) This refill is good for the , and will fit in the or the , but not the .

Frequently Asked Questions

Q: What is the Uni Jetstream SXR-80 refill?

A: The Uni Jetstream SXR-80 is a replacement refill designed for compatible Jetstream multi-function and multi-color pens. It uses Uni's low-viscosity Jetstream ink, known for a smooth writing feel and relatively quick drying performance. The SXR-80 family is available in different tip sizes and ink colors, making it possible to keep using the same pen body while replacing only the refill.

Q: What is the difference between the SXR-80 Eco Packaging and the regular Jetstream refill?

A: The main difference is the packaging. The newer Eco Packaging version uses a paper-based package designed to reduce packaging materials while maintaining the refill's quality. The newer version also increases the ink volume by around 10% compared with the previous specification. Depending on the tip size, the product code may include a “K” suffix, such as SXR-80-07K.

Q: What do SXR-80-38, SXR-80-05, SXR-80-07, and SXR-80-10 mean?

A: The number after SXR-80 indicates the ball tip size. In general, SXR-80-38 refers to 0.38 mm, SXR-80-05 to 0.5 mm, SXR-80-07 to 0.7 mm, and SXR-80-10 to 1.0 mm. A finer tip is useful for compact handwriting and detailed notes, while larger tips can provide a broader and more noticeable line.

Q: How do I know if the SXR-80 refill will fit my Jetstream pen?

A: Refill compatibility depends on the specific pen model, not simply on the fact that it uses Jetstream ink. The SXR-80 is a particular refill format used by many Jetstream multi-pens and compatible pen bodies. Before ordering, check the refill code recommended for your exact pen model. This is especially important because Uni offers several different Jetstream refill families with different lengths and shapes.

Q: Can I use different SXR-80 tip sizes in the same pen?

A: In compatible pen bodies, different SXR-80 tip sizes may be interchangeable because the refill body can remain the same while the ball size changes. However, compatibility should always be confirmed for the specific pen and refill combination rather than assumed from the Jetstream name alone. For example, users have reported changing compatible SXR-80 refills between 0.38 mm, 0.5 mm, 0.7 mm, and 1.0 mm configurations.

Q: Which SXR-80 tip size should I choose?

A: Choose based on your preferred writing style. The 0.38 mm version is useful for small handwriting, planners, and compact notes. The 0.5 mm version offers a balance between fine lines and comfortable everyday writing. The 0.7 mm version is a popular choice for general writing and a more noticeable line, while 1.0 mm provides a broader, smoother-feeling line. If you're unsure, 0.5 mm or 0.7 mm can be a practical starting point.

Q: Why do people like Jetstream SXR-80 refills?

A: A major reason is that the refill allows users to keep a familiar pen body while continuing to use Jetstream ink. This is especially useful for people who have already found a Jetstream multi-pen or compatible pen body that they enjoy. Reddit discussions also show that stationery enthusiasts often experiment with different SXR-80 tip sizes and compatible bodies rather than replacing an entire pen when the ink runs out.

Q: Is the SXR-80 refill suitable for Jetstream multi-function pens?

A: Yes, the SXR-80 family is specifically associated with many Jetstream multi-color and multi-function pen configurations. However, Jetstream has several refill formats, so it is important to match the refill code with your particular pen model. For example, recent compatibility discussions distinguish SXR-80 from other Jetstream families such as SXR-7, SXR-200, and SXR-600.

Q: Is the SXR-80 Eco Packaging a more environmentally conscious option?

A: The Eco Packaging version is designed with a paper-based package as part of Uni's packaging reduction efforts, while keeping the refill itself suitable for regular Jetstream use. The updated version also provides approximately 10% more ink than the previous specification, allowing the refill to be used for longer before replacement. It is a practical choice for customers who already prefer refillable writing tools and want to reduce unnecessary packaging.

Q: Is the Uni Jetstream SXR-80 an authentic Japanese refill?

A: We work with a broad supplier network covering Japanese stationery markets and international distribution channels. Our sourcing network includes suppliers and distribution partners that handle authorized genuine stationery products. We carefully select product sources and aim to maintain consistent sourcing for popular Uni Jetstream refills, rather than relying on an unknown or single supply channel.

Q: Can I use an SXR-80 refill in a pen that originally came with another Jetstream refill?

A: It depends on the pen model and the refill family. Some Jetstream pens can accommodate multiple tip sizes within the same refill family, while others require a different refill format. It is therefore better to identify the original refill code or exact pen model before switching to SXR-80. This is one of the most common compatibility questions among Jetstream users.

Q: Where can I learn more about Jetstream pens and compatible refills?

A: If you're building a Jetstream setup or aren't sure which refill fits your pen, our Jetstream collection is a useful starting point. From everyday Uni Jetstream pens to Uni Jetstream Edge and Jetstream multi-function models, you can explore the wider series and then match your pen with the appropriate refill. For SXR-80 specifically, checking the exact model code before ordering is the safest way to avoid compatibility issues.