If your marker is dried out

If you store them vertically upwards they will dry out and if you store them vertically downwards they will drip

waves and much more

This will keep the rust at bay

in strength for magnetic glass boards

Møtrik M4 - Stålmøtrik FZB, 10-pak BF Tier1 If your marker is driedPack of 10 steel nuts with M4 thread. You get a package of 10 pieces. Thread: M4 Model: DIN 934 8 FZB Package: 10 pieces. What does FZB mean? It is an electro galvanization of the nuts (electro galvanizing), which extends their durability and makes them more resistant to rust. However, as they are not acid free, they are not suitable for outdoor use. Good for use with magnets with external thread. Usually you can only buy nuts in large packages of 100