Material NdFeB Neodymium Shape Block Size 25mm x 8mm x 2mm /- 0.1mm Grade N52 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face 25mm x 8mm Quantity 2 – 500 Vertical Pull Force 2.7kg against minimum 5mm steel plate