Introduction Paragraph
The Dual-color Shell All-in-One Ballpoint Pen (0.7mm) revolutionizes multi-color writing with its innovative design, integrating 8 vibrant hues (red/blue/black/green/violet/orange/pink/brown) into a single pen. Available in blue or pink shells, this tool eliminates the hassle of switching pens, making it ideal for students, professionals, and creative writers. Its push-button color switching and ergonomic build redefine efficiency for note-taking, annotations, and artistic projects.

Features
8-in-1 Color Integration
Includes red, blue, black, green, violet, orange, pink, and brown for versatile marking.
Basic colors (black/blue/red) for daily records; vibrant hues for highlighting; soft tones for creative notes.
Smooth Writing System
0.7mm oil-based tip ensures even ink flow, no skipping, and minimal paper scratching.
Suitable for rapid note-taking, document signing, and detailed annotations.
Intuitive Operation Design
Push-button mechanism allows one-click color switching with zero accidental touches.
Pen clip displays color number (1-8) for instant visual identification.
Ergonomic & Portable Build
14cm lightweight body (18g) prevents hand fatigue during extended use.
Metal pen clip attaches to notebooks, pockets, or planners for easy carry.
Dual Shell Aesthetics
Blue model: Sleek, professional design for business and academic settings.
Pink model: Playful, feminine style for creative journals and personal use.

Specifications
Color Configuration:8 standard colors (red/blue/black/green/violet/orange/pink/brown)
Shell Options:Blue / Pink (matte finish)
Writing Tip:
0.7mm tungsten carbide ballpoint
Oil-based ink formula (quick-drying, fade-resistant)
Physical Dimensions:
Length: 140mm
Diameter: 12mm (barrel)
Weight: 18g (including ink)
Performance Metrics:
Each color writes ~150 meters
Ink shelf life: 24 months unopened
Compatibility:All standard paper types (copy paper, notebook paper, glossy sheets)
Packaging:Individual blister pack with color shell window
Certification:RoHS compliant (non-toxic ink and plastics)

What's in the box
1 × Eight-color ballpoint pen