Sekisei Azone glass pen tip spare onion type

The glass pen (silicone) is a completely new and innovative combination of glass and silicone. Replacing the tip is easy, just pull it out of the barrel.
* Spare tip for the Glass Pen (Silicon) with a new sensation of drawing
*Since each glass pen tip is handmade, there may be individual differences in the degree of twist and size.
*If the glass is rough and the ink tends to smudge, please refer to the instruction manual and use the included sandpaper to adjust the texture. (Please be careful not to sand the spiral grooves.)
*This product is made of delicate glass, so please be careful not to drop it or subject it to shock. We cannot repair it if it is damaged. Thank you for your understanding.