20x10x5mm Strong Rare Earth Neodymium Magnets, Heavy Duty Bar Magnets, Rectangular Magnetic Bar, Small Strong Magnets for Kitchen Office DIY Crafts Science Tool Storage – 30Pack

🌷Well Coated: These Neodymium Bar Magnets are Ni+Cu+Ni triple layer coated, which makes them very durable and offers a shining surface. This Ni+Cu+Ni coating also offers ideal rust resistant protection.

🌷Permanent magnets: These magnets are made of premium rare earth metal, they are ultra strong and permanently magnetic, their magnetic strength would not reduce over time. They would never loss their power even when close to other magnets or you drop them down.

🌷Super Powerful: This is the strongest magnet in its size! Each piece of magnet holds more than 8 lbs' weight. Internal Strength: 10,400 Gauss. Surface Strength: 4,000 Gauss.

🌷Magnet Dimensions: 20mm x 10mm x 5mm (approx. 0.8" x 0.4" x 0.2"). Tolerances: ±0.1mm x ±0.1mm.