5pcs N50 20mmx4mm Strong Round Countersunk Ring Magnets 5mm Hole Rare Earth Neodymium Magnets

Description: 5pcs N50 20mmx4mm Strong Round Countersunk Ring Magnets 5mm Hole Rare Earth Neodymium Magnets Specification: Shape: Disc Round Magnetic face: 20mm x 4mm (Dia. * Thickness ) Hole Dia. : 5mm Plating: Ni-Cu-Ni ( Nickel ) Material: NdFeB Grade:N50 Color: Silver Quantity: 5pcs Features: Can also be used to extend protected lithium batteries with recessed contact points. Electrically conductive (making them suitable to extend recessed batteries). Perfect for sticking notes on fridge doors. Great for DIY projects. Tip: 1, Strong magnets should Keep away from Ironware and some easily magnetized iron products, such as monitors, bank cards, computers, televisions, mobile phones and other 2, Strong magnets should be stored in a dry, heated environment, and need to use of plastic, wood, cardboard, foam to separated and wrapped. 3, Magnets might affect water meter ,electric meter, gas meter and some metering equipment exist some inaccurate affect (Such as : if magnets placed near the meter, the meter will slow down) Package Included: 1x Pack (5pcs) Neodymium Magnets