Material NdFeB Neodymium Shape Disc Size 20mm diameter x 5 mm thickness /- 0.1mm Grade N52 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face Axially Magnetised Quantity 25-1000 Vertical Pull Force 9.6 kg against minimum 5mm steel plate