Sy-i magneter 12x3 mm. firkant, 2-pak

This product is a set of two neodymium magnets used for sewing onto fabrics, curtains, and other magnetic materials. The magnets are marked with + and - to indicate polarity and are water-resistant except when the fabric is sewn through the central air bubble.

• The description claims the magnets lose strength with increasing distance between them.
• The description claims the magnets can hold up to 3.4 kg directly.
• The description claims the magnets are effective through 2 mm of fabric but only hold 135 g per magnet through 5 mm of fabric.