Synaptek Grid is made of an alloy of beryllium and copper.
The support film is held and the coating is very stable, and it is easy to distinguish the front and back, and it is devised for convenient handling.
It is strong enough to withstand reuse after cleaning.
DOT:Two dots are engraved on one side so that the front and back can be distinguished with the naked eye.
NOTCH:A dent is engraved on one side for convenient handling.
NUM:Random numbers (with duplicates) are engraved on one side.