1. Removable refill 2B Resilient TPU pen refill, can write freely without damaging the screen, and can be replaced due to wear and tear 2. HB allows for easy switching 3. TPU material pen refill, effective noise reduction and peace of mind learning, not disturbing others 4. Easy installation and easy replacement of pen tips 5. Effectively reducing noise and significantly reducing writing noise Colour:Transparent Material:ABS Size:4.5x4.5x2cm Package Contents: 1 * pen nib 1 row * HB refills 1 row * 2B refills Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.