This is a strong rectangle magnet which is made of rare earth neodymium, because it is very thin, so someone called retangular sheet magnet. The working temprature is 80℃ (can reach 220℃ highest), and its surface is coating nickel with silvery white to improve corrosion resistance and provide a smooth and clean finish. The tolerance is only ±0.05mm, and the specific size in 15mm in length, 10mm in width, 1mm in thickness.
These neodymium magnets have high performance and some customers also choose to backglue one side, that is flat magnet with adhesive, making them ideal for manufacturing refrigerator magnets, book and folder closures, packaging, retail displays and craft making. They are also available with the South Pole on the non-adhesive side. Remember, if using two to attract together, you need to make sure that each has opposite polarity on the non-stick side.
The sample of self-adhesive magnet:
Magnet closure self-adhesive square neodymium magnet 12 x 12 x 2mm