Zebra bLen: Low-Vibration Pen, Gel vs Emulsion Ink

Side view of a black Zebra bLen 0.7 mm retractable pen drawn to scale, 143.6 mm long and 11.8 mm wide, with an inset cutaway of the metal weight inside the grip — The bLen 0.7, 143.6 mm long (drawn at 1 mm = 5 px); the inset shows the weight in the grip.

Product facts

Product: Zebra bLen retractable pen (US: 0.7 mm gel; Japan: BAS88 0.5 mm and BA88 0.7 mm emulsion ballpoint)
Brand: Zebra
Brand origin: Japan
Made in: Not stated^*
Material: Plastic body with a metal weight inside the grip
Released: December 2018^*
Price range: $under $5 per pen (multi-packs divided by the count)

Notes on these facts

Made by Zebra Co., Ltd. (Tokyo); sold in the US by Zebra Pen Corporation. Country of manufacture not stated: Neither Zebra's Japanese product page nor the US retailer listings we found state a country of manufacture for the bLen. Check the packaging. Price: example listing. Released: Japanese launch of the emulsion-ink ballpoint, per Zebra's press release. We didn't find a US launch date for the gel version; The Pen Addict reviewed it in October 2022.
Price bands are typical US retail, checked October 2026. Conversions to US dollars are approximate, at October 2026 rates (US$1 = ¥158 = ₩1,330 = NT$32.5 = CN¥6.7 = SEK 9.9 = DKK 6.7 = ₺49.6 = C$1.41 = A$1.43; €1 = US$1.12; £1 = US$1.32; CHF 1 = US$1.21).

Key takeaways

Zebra's Japanese site lists the bLen 0.5 and 0.7 at 143.6 mm (5.7 in) long, 11.8 mm across and 12.3 g.
Zebra Japan launched the bLen on December 12, 2018; Zebra says it sold 5 million in its first year and the series passed 50 million by November 2023.
US packs from Zebra Pen are 0.7 mm gel pens, sold in 2-packs and a 6-color pack (item 49501), and listed as non-refillable.
The Japanese bLen takes NC-0.5 or NC-0.7 emulsion refills and lists at ¥165 (about US$1.00).
Zebra has added multi-pen versions in Japan: the bLen 3C (2020) and the five-function bLen 4+S (2024).

What is the Zebra bLen?

The bLen is a retractable pen that Zebra designed to stop the small shake of the point as you write. Zebra Japan launched it on December 12, 2018, after developing it with the Tokyo design office nendo, which also chose its body colors. Zebra says the series had passed 50 million pens shipped by November 2023.

Zebra’s launch release says the name is a coined word from bure-nai (ブレない), “doesn’t wobble”. In the US, Zebra Pen sells it in grocery, office and big-box stores; Walmart’s listing for a 0.7 mm 2-pack shows 4.4 stars from 38 reviews.

How does the bLen reduce vibration?

Zebra’s bLen System does three things: a part holds the refill’s tip when you click, a metal weight inside the grip lowers the center of gravity, and the internal parts fit with no gaps. Zebra’s launch release adds a dedicated refill with a thicker tube that flexes less. US listings describe the weight as brass.

Zebra says a vibration-frequency study with the Nagoya Institute of Technology found the bLen damped vibration best in every band it measured.

These are Zebra’s claims. The Pen Addict’s 2022 review of the US gel version found it silent, with no rattle, but pointed out that other gel pens are quiet too.

Zebra bLen specs

Spec	Japan (BA88 / BAS88)	US (Zebra Pen)
Ink	Emulsion (oil and water) ballpoint	Gel
Point sizes	0.5 and 0.7 mm	0.7 mm Medium
Length	143.6 mm (5.7 in)	Not published
Widest diameter	11.8 mm	Not published
Weight	12.3 g	Not published
Refill	NC-0.5 or NC-0.7	Listed as non-refillable
Packs	Single pens in many body colors	2-packs (black or white barrel), 6-color pack 49501
Japanese list price	¥165 (about US$1.00)	Price band $
Japanese code (0.5 mm black)	BAS88-LP, JAN 4901681577118	2-pack UPC listed as 0004588841412 (Kroger)

Japanese figures come from Zebra’s product page and refill list. US details come from Walmart, Quill and a Canadian office-supply listing. We assume the US gel pen shares the Japanese body, but Zebra doesn’t say so.

To-scale outlines at 1 mm = 3.6 px: Zebra bLen 0.7 at 143.6 mm long and 11.8 mm wide, Zebra Sarasa Clip 0.5 at 141 mm and 11.1 mm, uni-ball One at 139 mm and 10.5 mm — The bLen is a little longer and thicker than two popular gel pens.

Is the US bLen different from the Japanese one?

Yes: the US bLen is a gel pen, while the Japanese original is an emulsion-ink ballpoint. The Pen Addict’s August 2022 ballpoint review notes the pen was only available in Japan at launch; the gel version reached US stores later.

Choose the gel version if you like dark, smooth gel lines; The Pen Addict found it smudge-proof within 3 seconds in its test. Import the Japanese ballpoint if you want quick-drying emulsion ink and replaceable NC refills.

Which bLen versions are there?

Japan sells the single pen in 0.5 and 0.7 mm plus several multi pens. Zebra released the three-color bLen 3C on March 16, 2020, and the bLen 4+S, with four ink colors and a mechanical pencil, on February 29, 2024. There’s also the oil-based bLen U.

Zebra added new standard body colors in July 2021. US stores mostly carry black or white barrels and an assorted gel pack.

How does the bLen compare with other everyday pens?

It’s the pick for a steady, rattle-free pen; other pens win on refills and point sizes.

Pen	Ink	Point sizes	Notes
Zebra bLen	Gel (US), emulsion (Japan)	0.7 mm (US); 0.5, 0.7 mm (Japan)	Metal weight in the grip
Zebra Sarasa Clip	Pigment gel	0.3 to 1.0 mm	Spring-loaded binder clip
uni-ball One	Pigment gel	0.38 to 0.7 mm	Darker color claim
uni-ball Jetstream RT	Hybrid ballpoint	0.5 to 1.0 mm	Quick-drying low-viscosity ink
Pilot Acroball	Low-viscosity oil ballpoint	0.5 to 1.0 mm	Refillable with BRFV-10

For more gel options, see our best gel pens roundup.

Where is the Zebra bLen made?

Neither Zebra nor the US retailers we checked say where the bLen is made. Zebra Co., Ltd. is based in Tokyo, and Zebra Pen Corporation sells its pens in the US. Check the packaging for the country of origin.

Frequently asked questions

What does bLen mean?

Zebra Japan says the name is a coined word from bure-nai (ブレない), "doesn't wobble". Zebra built the bLen to damp that vibration, with a metal weight in the grip and a design that holds the refill steady.

Is the Zebra bLen a gel pen or a ballpoint?

It depends on where you buy it. The Japanese bLen is a ballpoint with Zebra's emulsion ink; the bLen packs Zebra Pen sells in the US are 0.7 mm gel pens.

How big is the Zebra bLen?

Zebra's Japanese site lists the bLen 0.5 and 0.7 at 143.6 mm (5.7 in) long and 11.8 mm across at the widest, weighing 12.3 g.

Is the Zebra bLen refillable?

The Japanese ballpoint takes Zebra NC-0.5 or NC-0.7 emulsion refills. A Canadian office-supply listing describes the US 0.7 mm gel 2-pack as non-refillable.

Who designed the Zebra bLen?

Zebra developed it with nendo, the Tokyo design office led by Oki Sato, which also chose the body colors, according to Zebra Japan.

Does the bLen really feel steadier?

That's Zebra's claim. The Pen Addict found the US gel version quiet and rattle-free but noted other gel pens are quiet too; we haven't measured it.

Is there a multi-color bLen?

Yes, in Japan. Zebra released the three-color bLen 3C in 2020 and the bLen 4+S, with four ink colors and a mechanical pencil, in 2024.

Sources (13)

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