About the Design:

This tie clip features a E=MC2 Mass–energy equivalence. They will make an extra special gift for your favourite person on their anniversary, wedding or another occasion. 

In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame, where the two values differ only by a constant and the units of measurement. The principle is described by the physicist Albert Einstein's famous formula: E = mc^2.

This will make a striking finishing touch for your suit style. 

Weight: Approx. 18 grams
Length: 5.5 mm  or 2 1/4 inch
Diamter: 19.5mm or 0.76 inch