Material NdFeB Neodymium Shape Block Size 8mm x 3mm x 2mm /- 0.1mm Grade N35 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face 8mm x 3mm Quantity 10 – 1000 Vertical Pull Force 0.4 kg against minimum 5mm steel plate