**Specifications:**
**Brand:** Dian Shi
**Product Name:** Self-Control Ink Ballpoint Pen DS-904
**Model:** DS-904
**Ink Color:** Black, Red
**Tip Size:** 0.5mm
**Packaging:** Set of 5 Black + 1 Red
**Features:**
- High-capacity brush pen for solving equations
- Equipped with self-control ink system
- Smooth and stable writing experience
- Quick-drying ink for clean paper surface
- Four-point support pen tip for durability and stability
- Made with wear-resistant and drop-resistant materials
**Product Dimensions:** 14cm
**Ink Capacity:** 10.5m per pen
**Standards:** GB21027, GB/T32017
**Design Patent:** ZL2016302162373
**Manufacturer:** Qingdao Dian Shi Stationery Co., Ltd.
**Address:** North Huari Road, Xiagezhuang Town, Qingdao, China
**Contact:** 0532-85698770
**Origin:** China
**Set Composition:** 5 Black Pens, 1 Red Pen
**Additional Information:**
The DS-904 Self-Control Ink Ballpoint Pen by Dian Shi is an original design featuring a unique self-control ink system for smooth and stable writing. The pen is ideal for precise writing tasks and is equipped with quick-drying ink to ensure a clean paper surface. Each pen in the set has a 0.5mm tip and comes in black and red ink colors. The product meets Chinese quality standards and holds a design patent.
