D 3 x 4 mm
Material NdFeB Neodymium Shape Cylinder Size 3mm diameter x 4mm thickness   /- 0.1mm Grade N35 Operating Temperature ≤80℃ /176F Plating Triple plated (Nickel-Copper-Nickel) Magnetic Face Axially Magnetised Quantity  50-1000 Vertical Pull Force  0.24  kg against minimum 5mm steel plate