you should test on a small corner of the board before cleaning the entire surface

This is very handy if you need magnets for attaching strings or wires close to each other with the same distance

This gives you a strong magnetic sign that holds up to strong winds and weather

we don't force you to buy packages

Power magnet, Blok 30x30x15 mm. julepynt you should test on aVery strong block magnet of neodymum. The magnet has a N value of 45, and the strenghth is approx. 35 kg in straight tractive power. Length: 3 cm. Width: 3 cm. Height: 1. 5 cm. Strength: approx. 35 kg. This magnet is not only strong it is very strong! If two magnets stick together, you will need the edge of a table to seperate them again. We highly recommend that you don't use magnets in this size for glass boards because they easily break the glass