Sailor TUZU ADJUST Glassy Crystal Sky Fountain Pen

Sailor TUZU ADJUST Glassy Crystal Sky Fountain Pen

The Sailor TUZU ADJUST Glassy Crystal Sky Fountain Pen combines the innovative adjustable system of the TUZU series with a transparent blue-toned body that reveals the internal structure of the pen. Its stainless steel nib can be repositioned using Sailor's distinctive rotating mechanism, while the Natural Fit Grip provides a comfortable and stable hold. Lightweight, ergonomic and designed to accommodate different writing styles, it comes with a Sailor converter and is also compatible with Sailor cartridges.

Glassy concept and design

The TUZU Glassy collection brings a transparent, demonstrator-inspired aesthetic to the functional design of TUZU. In the Crystal Sky version, the blue tone adds colour to the translucent body without concealing the internal construction of the fountain pen. The result retains the technical character of the Glassy collection while creating a brighter appearance in which colour, transparency and internal components all become part of the design.

Adjust System: a fountain pen that adapts to your writing

One of the defining features of TUZU is its rotating nib system. Instead of requiring you to change the way you naturally hold a fountain pen, the nib can be rotated to better match your usual writing angle. Adjustment is possible in 10° increments, helping you find a comfortable nib position according to your individual grip and writing habits.

Natural Fit Grip

The section incorporates Sailor's Natural Fit Grip, designed with two gently sloping surfaces where the fingers can rest naturally. The broad contact area helps provide a comfortable and stable hold. Combined with the rotating nib system, it allows the writing position to be adapted without forcing the hand into an unfamiliar grip.

Nib and filling system

The Sailor TUZU Glassy Crystal Sky is fitted with a stainless steel nib available in three sizes: Fine (F), Medium (M) and Broad (B). It uses Sailor's proprietary cartridge/converter filling system and is supplied with a converter already installed inside the pen, allowing it to be filled directly from an ink bottle or used with Sailor ink cartridges.

Package contents

• Sailor TUZU Glassy Crystal Sky Fountain Pen.
• Sailor converter installed inside the pen.
• Sailor TZ-01 presentation box.
• Manufacturer documentation.

Technical specifications

• Brand: Sailor.
• Series: TUZU Adjust Glassy.
• Colour: Crystal Sky.
• Nib: Stainless steel.
• Available nib sizes: F, M and B.
• Adjust System: Nib rotation in 10° increments.
• Grip: Natural Fit Grip.
• Cap, barrel and clip material: Recycled polycarbonate.
• Section: ABS resin.
• Metal parts: Nickel-chrome finish.
• Filling system: Sailor cartridge or converter.
• Converter: Included.
• Dimensions: Ø 17.5 × 135 mm, including the clip.
• Weight: 20 g.
• Origin: Japan.

Crystal Sky: transparency in a luminous blue tone

The Crystal Sky version interprets the Glassy concept through a transparent blue tone that visually recalls the clarity of the sky. The colour keeps the internal construction of the fountain pen visible while adding depth as its components are viewed through the translucent body. The converter remains visible inside the barrel, reinforcing both the demonstrator aesthetic and the technical character of the TUZU Glassy collection.

Images are for reference only; minor variations from the actual product may occur.

Frequently Asked Questions

• What is the difference between TUZU Glassy and the standard TUZU? The Glassy collection introduces a transparent aesthetic that reveals the internal structure of the pen while retaining the main ergonomic and functional features of TUZU Adjust.
• Can the nib position be adjusted? Yes. The Adjust System allows the nib to rotate in 10° increments to better match the user's natural writing angle.
• Which nib sizes are available? It is available with a stainless steel Fine (F), Medium (M) or Broad (B) nib.
• Does it use standard international cartridges? No. TUZU uses Sailor's proprietary cartridge and converter system.
• Is a converter included? Yes. Sailor supplies this model with the converter already installed inside the pen.
• How much does it weigh? The pen weighs approximately 20 g.

See how to adjust your TUZU in the following video:

History and philosophy of Sailor

Founded in Hiroshima in 1911, Sailor has spent more than a century developing Japanese writing instruments. Throughout its history, the company has combined craftsmanship, precision and technical innovation to create fountain pens recognised around the world. With the TUZU series, Sailor brings that experience to a new generation of writers through a particularly ergonomic idea: rather than asking the writer to adapt their hand to the pen, the fountain pen itself can be adjusted to suit their natural writing position. This functional approach received recognition in 2024, when TUZU earned an Excellence Award in the Functionality category of the Japan Stationery Awards.

“Your way of writing is unique. TUZU adapts to it.”