Exchangeable fiberglass inserts adapted to the Glass Eraser Pen Faber-Castell. They are a less invasive, better alternative to scratching carbon ink with a knife or razor blade that can destroy its surface. They are also suitable for removing small stains and rust marks that may appear on various household items. The inserts are pulled out of the rubber by means of a mechanism (twisted stick). The price is for 1 piece.
An empty bottle with a cap with a capacity of 30 ml can be used to store a wide range of products. Made of durable plastic with a tight screw closure, it may be reusable.