Material NdFeB Neodymium Shape Block Size 5mm x 4mm x 1.5mm /- 0.1mm Grade N35 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face 5mm x 4mm Quantity 10 -1000 Vertical Pull Force 0.29 kg against minimum 5mm steel plate