The magnet base is rubber coated to protect the magnet from damage, avoid scratching painted surfaces and restrict the magnet from sliding on slippery surfaces. Convenient for outdoor use: Our vertical disk magnets have 3 layers of - coating on the to protect accessories, and the outer rubber coating is also waterproof, so it can be used outdoors for a long time with confidence. POWERFUL MAGNET MOUNTING BASE: The rubber-coated round base is 1.69 inches/43mm in diameter and houses 6 magnets with 22 pounds of vertical magnetic pull against the steel base. You receive of 18 threaded magnets with black rubber coating, including threaded magnets with bolts, M6 spring washers, M6 flat washers and M6 nuts Multifunctional use: M6 external thread studs, screw directly into the threaded holes of the fixed body or pass through the holes and tighten with washers to connect any hardware components. Perfect for cameras, light bars, display panels, automation equipment, tools and machines., Weight: 1.40213998632 pounds, Manufacturer: Prterver