Uni-Ball UMN-105 Retractable Gel Pen - Black 0.5mm

Color Options: Multiple colors available

Model Numbers: 0.38mm and 0.5mm

Special Features: Dual-ball design to prevent ink leakage, stable rotation of the pen tip, vibrant and colorful ink, smooth writing experience

Ink Type: High-tech pigment ink, waterproof, lightfast, non-fading, non-smudging, stable writing, smooth ink flow

Pen Tip Sizes: 0.38mm for blue, black, and red ink; 0.5mm for other colors

Ink Colors: Blue, black, red, light blue, pink, orange, purple

Grip: Comfortable rubber grip for long writing sessions

Refillable: Transparent pen barrel for easy ink refill, eco-friendly and cost-effective

Limited Edition: Vibrant polka dot design, suitable for a cute and fresh style

Hidden Patterns: Explore hidden patterns on select designs

Size: 140mm length, 10.5mm diameter, writing tip sizes 0.38mm/0.5mm

Color Variants: Black, blue-black, blue, sky blue, pink, red, orange, purple

Ink Variants: Blue, black, red, pink with black ink; rose red with black ink; purple with black ink

(Note: The specifications include detailed information about the uni Mitsubishi Signo RT series gel pens, highlighting their design, features, ink options, and special characteristics.)