Material NdFeB Neodymium Shape Block Size 40mm x 10mm x 10mm /- 0.1mm Grade N52 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face 40mm x 10mm Quantity 1 -100 Vertical Pull Force 18.5 kg against minimum 5mm steel plate