D 4 x 2 mm
Material NdFeB Neodymium Shape Disc Size 4mm diameter x 2mm thickness   /- 0.1mm Grade N52 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face Axially Magnetised Quantity  100-1000 Vertical Pull Force 0.42 kg against minimum 5mm steel plate