**Product Specifications:**
Brand: M&G
Model: K-350.5
Series: Gold Product
Craftsmanship: Eight Morning Heart Techniques
Material: Upgraded Soft Rubber Protective Cover, Frosted Pen Barrel
Ink: Low-key and practical, not prone to oil or dust
Spring Head Craftsmanship: "One-way Valve" design
Writing Pressure: Overcoming the spring force to open the ballpoint gap
Spring Mechanism: Retracts the ballpoint when not writing, opens the gap when writing
Tip Size: 0.5mm
Ball Material: High-precision Tungsten Carbide
Ink Type: Sealed with silicone oil, preventing leakage
Clip: Large-angle arc design, suitable for various thicknesses
Ink Color Options: 2 colors available
Packaging: 12 pens per box, single color
**Features:**
Focus on technological advancement for over 20 years
Classic design with meticulous attention to detail
Comfortable grip for long-lasting writing
High sealing performance to prevent ink leakage
Suitable for vertical storage without ink accumulation
Say no to ink leakage with advanced sealing technology
Available in 2 ink colors
**Note:** The product is part of the M&G Gold Product series, known for its craftsmanship and durability.