Wet-wipe (6mm) Chisel & bullet nib Posterman Pens are designed for internal & external use and are ideal for chalkboards that are used outside.
These Chalkboard Pens work on all surfaces including walls, glass, mirrors etc
Wet-wipe (6mm) chisel & bullet nib Posterman Pens - designed for internal & external use and will not run in the rain
* We have carried out numerous tests on our chalkboards & each time these pens have come off using wet wipes/baby wipes, however our chalkboards are NOT easy clean chalkboards. Therefore these wet wipe pens may leave a slight shadow when the pen is left on for a long period of time.