Power magnet, Ring 25x4x5 mm.

Neodymium ring magnet | Permanent magnets

A strong neodymium super magnet with a hollow core in the center. The surface is very large, and the hole is only 4mm (0.16 in./0.4 cm.) in diameter.

Diameter: 2.5 cm.
Height: 0.5 cm.
Hole size: 0.42 cm. 
Strength: approx. 9.4 kg.

Keep in mind, to achieve optimal levels of magnetism we recommend using the large surface, known as axial magnetism. This means that the magnet is magnetic on all sides, but you get the most strength from using the large surface instead of using the sides of the magnet.

These ring magnets are sold individually. On the right of this page, we offer large quantity purchasing options. Each bulk package offers a discount.

SPECIFICATIONS
Strength: approx. 9,400 g.
Material: NdFeB
Magnetism: N45
Max. temperature: 80°C
Surface: nickel coated (Ni-Cu-Ni)

NB! These magnets are normal ring magnets - not with countersunk hole.