... grade silicone rubber, non-toxic, environmental safe silicone rubber keypad: 1 Material: made of top grade silicone rubber, non ... coating, laser etching, back-lighted, hard/epoxy coating keypads5 Keypad surface with transparent spraying coating, PU coating6 Automatic painting and ... Half automatic potting process to add resin on each key top Travel0.8-0.5mmForce60-300gramsLife cycles1,000,000opOperating ...