Countersunk magnets 18x4 mm. (N + S), 10-pack

Now you can buy these 18x4 mm. neodymium countersunk magnets as a set. Here you get 10 magnets: 5 pcs. with north pole and 5 pcs. with south pole, so they can attract each other from the countersunk side.

Diameter: 1,8 cm.
Height: 0,4 cm.
Screw hole: ø 4,5 mm.
Strength: appox. 4 kg.
Package: 10 pcs.

Round magnet with a countersunk hole. The strength on 4 kg. is measured on a magnetic steelboard. If there is gap between the magnet and the magnetic counterpart, the strength is weakened a lot. 

This magnetic type is not reinforced with a metal pot. You therefore need to be carefull in handling the magnet as it will break by hard shock. 

Recommened for indoor use. By constant contact with wind and weather the power magnets will rust with time. 

SPECIFICATIONS
Strength: approx. 4.000 g.
Magnetisation: N35
Surface: nickel-plated (Ni-Cu-Ni)

NOTE! Set of 10 magnets. You can use these magnets opposite each other as a set if you screw them onto two surfaces that are to meet magnetically, as the poles are facing opposite directions on the magnets. There are a total of 5 sets - so 5 of each type of pole reversal.