AIHAO [Back to School Essential] Retractable Pen Refill, CS Tip 0.5mm Quick-Drying Exam Pen Replacement Refill, Signature Pen Refill, Red, 20 Pieces/box, GR1212

**Product Specifications:**

**Brand:** AIHAO

**Model:** NEWSMOOTH, REPLACEMENT, CSNIB

**Features:**

- Smooth writing experience with CS pen tip

- Double smooth CS pen tip for fatigue-free writing

- 0.5mm tip size

- Suitable for CS brush pens

- Refillable with push-button mechanism

- Ink type: M quick-drying ink

- Available colors: GR1212 crystal blue, GR1212 true black, GR1212 red

- Waterproof and smudge-resistant

- Pack of 20 pens

**Ink:**

- Quick-drying ink that does not smudge

- Imported ink for waterproof and anti-blooming properties

**Packaging:**

- Individually packaged in a box of 20 for easy storage

**Compatibility:**

- Compatible with most push-button neutral pens

**Production Date:** 2023

**Color Options:** Red, true black

**Usage:** Suitable for most push-button neutral pens

**Additional Information:**

Suitable for writing, drawing, and highlighting

Ideal for students, professionals, and everyday use

Ensures a steady and non-shaky writing experience

Suitable for various weather conditions

Long-lasting and durable design

(Note: The specifications are based on the provided information related to the AIHAO brand and its products.)