These disc magnets are 0.75 inch (19.1mm) diameter and 0.25 inch (6.4mm) thick. They are magnetized through the thickness. They are composed of grade 40 neodymium iron boron magnetic material and are plated in nickel-copper-nickel for a shiny corrosion resistant finish. Their individual pull force is approximately 16 lbs. Maximum working temperature is 176 F (80 C).
CHOKING HAZARD -- Small parts. Not for children under 3 yrs.