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125 mathematical and physical formulae engraved on one black stainless steel card.

The Card of Formulae

    • A black-plated stainless steel card engraved with 125 mathematical and physical formulae and 15 constants
    • The front side is engraved with 57 mathematical formulae and 6 mathematical constants, including the basic ones such as formulae for areas, perimeters and triangles, trigonometry, quadratic formula, volumes and surface areas, as well as some more advanced ones like normal distribution, trigonometric identities, binomial expansion
    • The back side is engraved with 68 formulae and 9 constants in Physics, such as those related to motions, forces, energy, waves, fluids, electricity, magnetism and special relativity
    • Made of highly durable and corrosion resistant SUS304 stainless steel
    • With ultra-luxurious feel given by the metallic lustre of the black stainless steel card
    • Laser-engraved words, symbols and numbers will never fade nor wear off
    • With a special dirt-repellent and anti-fingerprint coating applied
    • Thickness is enhanced to 0.6 mm to ensure the card is highly rigid and durable
    • Same size as a credit card (85.5 mm x 54 mm)
    • All images are for reference only. The photos may be slightly different from the actual item in terms of colour due to the lighting during photo shooting or the monitor's display.
    • The card sleeve shown in the product images is not included. It can be purchased here:
    • Dimensions: 85.5 mm x 54 mm (with rounded corners)
    • Thickness: 0.6 mm ± 0.03 mm
    • Material: SUS304 stainless steel
    • Colour: black
    • Coating: dirt-repellent and anti-fingerprint coating
    • Colour of the engraved information: silvery
    • Place of origin: Taiwan
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