• Dimensions: 3/8″ dia. x 3/8″ thick
• Tolerances: ±0.004″ x ±0.004″
• Material: NdFeB, Grade N42SH
• Plating/Coating: Ni-Cu-Ni (Nickel)
• Magnetization Direction: Axial (Poles on Flat Ends)
• Weight: 0.180 oz. (5.09 g)
• Pull Force, Case 1: 7.96 lbs
• Pull Force, Case 2: 9.10 lbs
• Surface Field: 5903 Gauss
• Max Operating Temp: 302ºF (150ºC)
• Brmax: 13,200 Gauss
• BHmax: 42 MGOe

If you are looking for a powerful magnet to put in your oil pan or attach to an oil filter, this is the magnet you need. The  cylinders are made with grade N42SH (SH = Super High Temperature) material. The SH material means that the magnets can be heated to 300° F without any loss of magnetic strength, unlike standard neodymium magnets that begin to lose strength at 175° F. Suitable for many high temperature applications.