200pcs N50 Strong Cylinder Disc Magnets Rare Earth Neodymium 10x1.5mm. Neodymium (chemical symbol Nd) is element 60 on the periodic table. It is a rare earth metal and forms one of the Lanthanides series. When added to Iron (Fe) and Boron (B) (chemical formula Nd14Fe21B), the resultant magnets are the strongest magnets currently available. Neodymium magnets are sometimes known as Neo, Neod or NIB magnets. Neodymium magnets are usually coated with Nickel-Copper-Nickel plating to prevent the iron from rusting. Neodymium block magnet is made of NdFeB, offering strong magnetic performance and corrosion-resistant appearance. It can be used at room temperature, with a maximum operating temperature of 80°C, and will not demagnetize under normal conditions. Specification: Shape: Cylinder Disc Material: NdFeB Grade: N50 Coating: Nickel (Ni) Color: Silver Quantity: 200 pcs Size: Diameter 10mm x Thickness 1.5mm Applications: 1. Audio equipment: speakers, receivers, microphones, alarms, stage audio systems, car audio systems, etc. 2. Electronics: permanent magnetic actuators, vacuum circuit breakers, magnetic relays, meters, sound meters, reed switches, sensors 3. Electrical devices: VCM, CD/DVD-ROM drives, generators, motors, servo motors, micro-motors, vibration motors 4. Machinery and equipment: magnetic separation, magnetic cranes, magnetic machinery 5. Healthcare: MRI scanners, medical equipment, magnetic therapy products 6. Other industries: water treatment systems, pipe descaling, magnetic fixtures, automatic mahjong machines, magnetic locks, doors and windows, luggage, leather goods, toys, tools, gifts and packaging Tips: 1. Keep strong magnets away from iron objects and items that can be easily magnetized, such as monitors, credit cards, computers, televisions, and mobile phones. 2. Store magnets in a dry, temperature-stable environment. Use plastic, wood, cardboard, or foam to separate and wrap them during storage. 3. Magnets may interfere with water meters, electric meters, gas meters, and other measuring devices, potentially causing inaccurate readings. For example, placing magnets near a meter may slow it down. Notice: Handle with care as magnets are fragile and may break if snapped together. Package Included: 200 pcs x N50 Strong Block Magnet