N50. 2" (50.8mm) diameter x 1" (25.4mm) thick, magnetized through the thickness. Extremely powerful - can easily crush fingers. NOT FOR KIDS!!!
Note: This magnet is in my Body Part Crushing Category. Yes, that means what it says - if you get your fingers caught between 2 of these they can get crushed and it will definitely hurt. Of course you can get some pain relief by quickly holding one of the poles on the injured area. Anyone buying more than one of these should certainly get a wooden wedge to help separate these in case of an accident.
Price is per piece.