Product Description Pack of 50. 40mm [1. 57 ] x 25mm [0. 98 ] x 10mm [0. 39 ]. each magnet's North and South poles are on opposite 40mm [1. 57 ] x 25mm [0. 98 ] Rectangular faces. 3kg [6. 6lb] Maximum pull from the magnetic surface when in flush contact with a mild steel surface of equal thickness to the magnet. Resistant to demagnetisation and corrosion without any extra coating. Also known as ceramic magnets, ferrite magnets offer excellent value for money when pull strength is not the most important factor. They have a high resistance to corrosion and demagnetisation, can operate in temperatures up to 180 Degrees Celsius [356°f] and are commonly using in conveyor systems, switches speakers and crafts. Please note – All Imperial measurements [INCHES (“) and pounds (lb.)] are rounded conversions from metric [millimeters (mm) and kilograms (kg)] production measurements and should be used as approximations only. Set Contains: 1 x 40 x 25 x 10mm thick Y30BH Ferrite Magnet - 3kg Pull ( Pack of 50 ) Pack of 50. 40mm [1. 57 ] x 25mm [0. 98 ] x 10mm [0. 39 ]. Each magnet's north and south poles are on opposite 40mm [1. 57 ] x 25mm [0. 39 ] rectangular faces. 3kg [6. 6lb] Maximum pull from the magnetic surface when in flush contact with a mild steel surface of equal thickness to the magnet. Resistant to demagnetisation and corrosion without any extra coating. ASIN B008UADHWA Color Charcoal Shape Rectangular Brand Name FIRST4MAGNETS Pull Force 3 Kilograms Unit Count 50.0 Count Item Weight 0.05 Kilograms Part Number F02510-50 Manufacturer Magnet Expert Ltd Model Number F02510-50 Material Type Alloy Steel Item Type Name 40 x 25 x 10mm Y30BH Ferrite Magnet Number of Pieces 50 Included Components Fifty x Y30BH Ferrite Magnets at 40 x 25 x 10mm Global Trade Identification Number 05060185925371