Rubber coating prevents corrosion or chipping damage to the magnet, and prevents damage to the surface you are mounting onto. The high friction of the coating offers greatly improved holding force on vertical surfaces.
If you need a soft surface on your magnet for mounting something on a fridge, car, or other surface you want to protect, don't waste your time with Plasti-dip because it won't work. NOTHING will stick to the surface of rare-earth (neodymium) magnets. Tape will protect temporarily but it will tear when you least expect it and damage will occur anyway.
SPECIFICATIONS
The magnet grade is N50. (the strongest grade commercially available)
The interior magnet is countersunk with dimensions 18 dia. x 6mm with a 3.0mm through hole. With the coating, the unit measures 20 mm dia. x 8mm. The countersunk hole through the middle accommodates an M3 or 6-32 screw.
Holding force: in our tests a single magnet will support a weight of at least 1350g from a vertical surface.
These are in stock in Rochester, NY and are always shipped within 24 hours of order.
See other listings for lower price per unit on larger quantities. This listing is for 10 pieces.
We don't have any other sizes.