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 10pcs Block Magnets 20x10x5mm Hole 4mm Rare Earth Neodymium N5Description: Shape: Block Material: Nd, Fe, B Grade: N50 Plating: Ni-Cu-Ni(Nickel) Color: Silver Quantity: 10pcs Size:20*10*5mm(Length*Wide*Hight)Hole 4mm Max Temp (degrees C):80Strong magnets should Keep away from Iron..

Description:8pcs N52 20x10x5mm Neodymium Block Magnets Rare Earth Magnets Shape : CuboidMaterial : NdFeB magnetic materialsProduct Size : 20x10x5mmGrade : N52Quantity : 8 Usage:1. Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio and so on.2. ..