--- title: "Pentel EnerGel Infree: Clear Gel Pen in 10 Colors" canonical: "https://stationerytimes.com/guides/pentel-energel-infree/" description: "Pentel EnerGel Infree explained: a clear-barrel EnerGel in 0.4, 0.5 and 0.7 mm and ten inks such as Rough Gray, 147 mm and 13 g, refill codes and prices." category: "Pens" type: "Gel pen" published: 2026-10-29 updated: 2026-10-31 author: "Ellis Penhale" publisher: "Stationery Times" sources: 4 products: - name: "Pentel EnerGel Infree gel pen, 0.5 mm needle tip (BLN75TL)" brand: "Pentel" brand_origin: "Japan" made_in: "Japan" material: "Recycled polycarbonate rear barrel and end, ABS knock and front barrel with plated-resin trim, elastomer grip, iron clip (Maruzen Junkudo)" price_band: "$ (under $5 per pen (multi-packs divided by the count), typical US retail, October 2026)" manufacturer: "ASTRUM Corporation (Tokyo), called Pentel Co., Ltd. until April 1, 2026; Pentel remains the brand" model: "BLN75TL" mpn: "BLN75TL-A" gtin: "4902506349675" url: "https://www.pentel.co.jp/products/ballpointpen/energel_infree/" --- # Pentel EnerGel Infree: Clear Gel Pen in 10 Colors > The Pentel EnerGel Infree is a Japan-market retractable gel pen with a clear barrel that shows the ink color, Pentel's quick-drying EnerGel ink and ten colors, including Rough Gray and Turquoise Blue. It comes in 0.4 and 0.5 mm needle tips and a 0.7 mm conical tip, and Maruzen Junkudo lists it at 147 mm and 13 g. - URL: https://stationerytimes.com/guides/pentel-energel-infree/ - Category: Pens - Author: Ellis Penhale - Published: 2026-10-29 - Updated: 2026-10-31 ![Pentel EnerGel Infree 0.5 mm drawn to scale at 147 mm: clear barrel showing a turquoise refill, metal clip, silver grip, with a needle-tip inset](https://stationerytimes.com/images/raster/pentel-energel-infree-illustration-16x9.png?v=7fc603b8) *The 0.5 mm Infree at Maruzen Junkudo's 147 mm, drawn at 1 mm = 5 px; the refill color is a representative tint.* Original illustration made for this guide. © Stationery Times. Original drawing (SVG): . Drawings © 2026 Stationery Times, reusable with credit under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). ## Product facts | Product | Brand | Brand origin | Made in | Material | Released | Price range (typical US retail, October 2026) | |---|---|---|---|---|---|---| | Pentel EnerGel Infree gel pen, 0.5 mm needle tip (BLN75TL) | Pentel (by ASTRUM Corporation (Tokyo), called Pentel Co., Ltd. until April 1, 2026; Pentel remains the brand) | Japan | Japan | Recycled polycarbonate rear barrel and end, ABS knock and front barrel with plated-resin trim, elastomer grip, iron clip (Maruzen Junkudo) | – | $: under $5 per pen (multi-packs divided by the count) | - Made in (Pentel EnerGel Infree gel pen, 0.5 mm needle tip (BLN75TL)): Japan. Maruzen Junkudo lists the country of origin as Japan for the 0.5 mm black (BLN75TL-A). Pentel's Japanese product page doesn't state it. Source: https://www.maruzenjunkudo.co.jp/products/4902506349675 ## Key takeaways - Pentel Japan lists three tips: 0.4 mm needle (BLN74TL), 0.5 mm needle (BLN75TL) and 0.7 mm conical (BL77TL), each at ¥275 (about US$1.70) with tax. - Every tip comes in the same ten inks, and a 10-color set of each size lists at ¥2,750 (about US$17). - Maruzen Junkudo gives the 0.5 mm black as 147 mm long, 13 g, and made in Japan, with a recycled polycarbonate rear barrel. - Refills are XLRN4TL, XLRN5TL and XLR7TL at ¥99 (about US$0.60) each, in all ten colors. - Pentel of America's store didn't list the Infree when we checked; US buyers get it from importers, in our $ band (under $5). ## What is the Pentel EnerGel Infree? **It is a Japan-market EnerGel with a clear barrel, so you see the ink color through the pen instead of on a colored body.** Pentel Japan presents it as an "idea expression tool", a pen for scribbling and developing ideas rather than plain office notes. Pentel names three things it wants from the ink: quick drying so you don't smudge, a smooth writing feel, and clear, sharp writing that is easy to read back. Those are the traits of the regular [Pentel EnerGel](https://stationerytimes.com/guides/pentel-energel/); the Infree adds its own colors and a see-through body. ## What tip sizes and model numbers are there? **Three sizes: 0.4 and 0.5 mm with needle tips and 0.7 mm with a conical tip.** Every size comes in all ten inks, and all share the clear barrel. | Tip | Pen model | Refill | Japanese list price | |---|---|---|---| | 0.4 mm needle (extra fine) | BLN74TL | XLRN4TL | ¥275 (about US$1.70) | | 0.5 mm needle (extra fine) | BLN75TL | XLRN5TL | ¥275 (about US$1.70) | | 0.7 mm conical (fine) | BL77TL | XLR7TL | ¥275 (about US$1.70) | | 10-color set, any size | BLN74TL-10, BLN75TL-10, BL77TL-10 | | ¥2,750 (about US$17) | Prices are Pentel Japan's tax-included list prices on October 29, 2026; refills list at ¥99 (about US$0.60). Pentel also lists blister-packed versions with an X prefix (XBLN75TL and so on) at the same price. ![EnerGel Infree ball sizes magnified 200 times: 0.4 and 0.5 mm needle tips and a 0.7 mm conical tip, with refill codes XLRN4TL, XLRN5TL and XLR7TL](https://stationerytimes.com/images/pentel-energel-infree-tips.svg?v=897e5832) *The three Infree tips at 200×, with their refills (Pentel Japan). Original illustration made for this guide. © Stationery Times.* ## What colors does the EnerGel Infree come in? **Ten: Black, Red, Burgundy, Blue, Blue Black, Orange, Rough Gray, Pink, Turquoise Blue and Violet.** Pentel Japan's page lists the same ten for every tip and in every 10-color set. Rough Gray is the unusual one. Pentel's user stories describe sketching rough ideas in it, then sharpening them with Violet and Turquoise Blue, and pairing Blue Black and Burgundy as quieter alternatives to blue and red. Yoseka sells the 0.5 mm in the same ten colors, though its listing calls Rough Gray simply "Grey". ## How big and heavy is it? **Maruzen Junkudo lists the 0.5 mm black at 147 mm long and 13 g.** Its package size is 16 × 11 × 147 mm, so the barrel is about 11 mm across and the clip adds the rest. Yoseka gives 14.8 cm (5.8 in), a millimeter longer, which is within rounding of the same pen. Pentel's page doesn't give a length or weight. | Spec | EnerGel Infree 0.5 mm (BLN75TL) | |---|---| | Length | 147 mm (5.8 in), Maruzen Junkudo; Yoseka 14.8 cm | | Width | 11 mm (0.4 in) barrel, 16 mm with clip | | Weight | 13 g | | Mechanism | Retractable knock | | Ink | EnerGel gel ink, quick-drying (Pentel) | | Materials | Recycled polycarbonate rear barrel, ABS front, elastomer grip, iron clip | ## How does it compare with the regular EnerGel? **Same family and ink promise, different body and color set.** The EnerGel RTX is the version Pentel sells in America; the Infree's barrel is clear and its ten inks include Rough Gray, Burgundy and Turquoise Blue. Their refills are different part numbers: the Infree's XLRN5TL is listed only for the Infree on Pentel's page. If you already use an EnerGel and want a similar quick-drying gel pen from another maker, our [Zebra Sarasa Clip](https://stationerytimes.com/guides/zebra-sarasa-clip/) guide covers the closest rival. ## Can you buy it in the US? **Yes, from importers, but not from Pentel's US store.** A search of Pentel of America's store on October 29, 2026 returned other EnerGel pens and refills but no Infree, which is why it appears in our [Japan-only pens](https://stationerytimes.com/guides/japan-only-pens/) roundup. On October 29, 2026 Yoseka listed the 0.5 mm at US$3.50 in all ten colors, which sits in our $ band (under $5). Pentel itself is now ASTRUM Corporation, renamed in April 2026, as our [Pentel history](https://stationerytimes.com/stories/pentel-history/) explains; the brand on the pen is unchanged. ## Where is the EnerGel Infree made? **In Japan, according to Maruzen Junkudo's listing for the 0.5 mm black.** Pentel's own page doesn't state the country of manufacture, and we couldn't read JetPens or Amazon, which block our tools. Pentel's limited soft-color Energel is covered in our [Energel Kohare guide](https://stationerytimes.com/guides/pentel-energel-kohare/). ## Frequently asked questions ### Is the EnerGel Infree sold in the US? Not by Pentel of America: a search of its store on October 29, 2026 found no Infree. Importers such as Yoseka Stationery sell it. ### Does the Infree use the same ink as a normal EnerGel? Pentel describes the same quick-drying, smooth EnerGel gel ink, but the Infree has its own color set and its own refills (XLRN4TL, XLRN5TL, XLR7TL), so we treat them as separate. ### What is Rough Gray? It is one of the ten Infree inks. Pentel's page pictures it as the color for sketching rough ideas before refining them with brighter colors. ### Which Infree tip is finest? The 0.4 mm needle tip (BLN74TL). The 0.5 mm also has a needle tip, and the 0.7 mm has a conical tip that Pentel rates as fine rather than extra fine. ### Can the orange Infree be hidden with a red sheet? Pentel's page says a user hides orange notes under a red sheet to memorize them. We haven't tested how well each color disappears. ### How heavy is the EnerGel Infree? Maruzen Junkudo lists the 0.5 mm black at 13 g, with a body of 16 × 11 × 147 mm including the clip. ### Is the Infree barrel recyclable plastic? Maruzen Junkudo lists the rear barrel as recycled polycarbonate. Pentel's own page doesn't describe the materials. ## Sources - [Pentel Japan (Japanese): EnerGel Infree product page (concept, 0.4/0.5 mm needle and 0.7 mm conical tips, ten ink colors, clear barrel, ¥275 with tax, 10-color sets ¥2,750, BLN74TL/BLN75TL/BL77TL, refills XLRN4TL/XLRN5TL/XLR7TL at ¥99; read October 29, 2026)](https://www.pentel.co.jp/products/ballpointpen/energel_infree/) - [Maruzen Junkudo (Japanese): EnerGel Infree 0.5 black, BLN75TL-A (16 × 11 × 147 mm, 13 g, country of origin Japan, materials, ¥275)](https://www.maruzenjunkudo.co.jp/products/4902506349675) - [Yoseka Stationery: Pentel EnerGel Infree 0.5 mm (ten colors, 14.8 cm, XLRN5TL refill, US$3.50; read October 29, 2026)](https://yosekastationery.com/products/pentel-energel-infree-0-5mm-1) - [Pentel of America store: search for "infree" (other EnerGel products, no Infree; read October 29, 2026)](https://www.pentel.com/search?q=infree&type=product)