Yizhet 20Pcs Neodymium Magnets, Strong Rare Earth Magnet, Bar Magnets for Crafts, Science, DIY and Refrigerator Multi Use 20 x 10 2mm

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 thier 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 2mm (approx. 0.8" x 0.4" x 0.08"). Tolerances: ±0.1mm x ±0.1mm.