But since they are not acid-free

yet thick magnets with a 3M adhesive backing (59-series)

The magnets are made of colored plastic with a strong ferrite magnet at the bottom

Vi anbefaler ikke brug af pottemagneter til glastavler

at fladen er helt plan

Magnetkroge sølv, 4-pak - køleskabsmagneter BF Tier1 But since they are notBox with 4 magnetic hooks in metal for the fridge. Use these silver colored magnetic hooks for hand towels etc. The back is covered with an anti slip silicone cap. The strength in direct pull is approx. 1. 5 kg. but you will need this strength to keep a towel hanging on your refridgerator, as the downward pull of the towel is tough on magnets. Strength: approx. 0. 5 kgs. in downward pull. Brand: Trendform MM4615 Color: Metal (silver). Size: 3. 5 cm.