20PCS Neodymium Rod Magnet 3mm x 4mm N35 Reed Switch Magic Craft

20PCS Neodymium Rod Magnet 3mm x 4mm N35 Reed Switch Magic Craft Description: 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 Nickel-Copper-Nickel plating to prevent the iron from rusting. Feature: Shape:rod Size:3x4mm Material:NDFEB N35 Application: Smaller magnets are often used for jewellery clasps, magnetic therapy, jewellery, magnetic earrings, fridge magnets, model train connectors,war gaming models, motors, science projects etc. Characteristics: Having high magnetic properties, good time stability and lower temperature coefficient. WARNING: Super strong magnets, please be careful with pick and place; we would not recommend this magnet be used by children under 5 without supervision. Package included: 20 x N35 Neodymium rod magnets