S4B - Neodymium Sphere Magnet - 1/4" Dia

• Dimensions: 1/4" diameter
• Tolerances: ±0.004"
• Material: NdFeB, Grade N42
• Plating/Coating: Ni-Cu-Black Ni (Black Nickel)
• Magnetization Direction: Axially Magnetized (Poles at 2 points, 180° opposite one another)
• Weight: 0.035 oz (1.01 g)
• Pull Force, Case 1: 1.63 lbs
• Pull Force, Case 2: 1.96 lbs
• Surface Field: 8815 Gauss
• Max Operating Temp: 176ºF (80ºC)
• Brmax: 13,200 Gauss
• BHmax: 42 MGOe

These are exactly the same as our S4 spheres except that they are plated with black nickel, which gives them a dark charcoal color instead of the standard shiny silver finish of nickel plating. They can be used alone, or combined with our standard silver S4 spheres and other shapes.

Note: Our "Black Nickel" plating is achieved by adding a special tint during the nickel plating process. The resulting color is not black. The appearance of these magnets is best described as grey, charcoal or gunmetal. Due to this unique process, slight variation in color may occur from order to order.