uni JETSTREAM 4&1 Multi-Function Pen 0.5 mm – 9 Variants

The uni JETSTREAM 4&1 combines five writing functions in one convenient pen, making it an ideal everyday tool for school, office work, planners and note-taking.

Each pen includes four ballpoint ink colors — Black, Red, Blue and Green — together with a built-in 0.5 mm mechanical pencil. This versatile design allows you to switch quickly between writing, color-coding and pencil work without carrying multiple writing instruments.

The ballpoint sections use uni’s popular JETSTREAM low-friction oil-based ink, known for its smooth and effortless writing feel. The ink produces clean, consistent lines while helping reduce writing resistance during long study or work sessions.

Its quick-drying performance also helps minimize smudging, making the pen suitable for fast note-taking, journaling and everyday writing.

The selector mechanism makes it easy to switch between the four ink colors and mechanical pencil, while the compact multi-function design helps keep your pencil case and desk organized.

Available in nine stylish barrel colors, from soft pastel tones to deeper, more sophisticated shades.

Product Features

• 5-in-1 multi-function writing instrument
• 4 ballpoint ink colors: Black, Red, Blue and Green
• Built-in 0.5 mm mechanical pencil
• 0.5 mm ballpoint tip
• Smooth JETSTREAM low-friction oil-based ink
• Quick-drying ink
• Easy function-switching mechanism
• Ideal for school, office, planners and everyday writing
• Compact alternative to carrying multiple pens
• Available in 9 barrel colors
• Made in Japan

Available Colors

• Olive Green
• Coral Orange
• Cream Yellow
• Ivory
• Cobalt Green
• Night Blue
• Slate Gray
• Lavender
• BK White

Product Specifications

• Ballpoint Tip Size: 0.5 mm
• Mechanical Pencil Lead Size: 0.5 mm
• Ballpoint Ink Colors: Black, Red, Blue, Green
• Ink Type: Oil-based JETSTREAM ink
• Overall Length: Approx. 148 mm
• Main Materials: ABS Resin, Steel
• Country/Region of Origin: Japan
• Type: Multi-Function Ballpoint Pen with Mechanical Pencil