... of top grade silicone rubber, non-toxic, environmental safe (2) Hardness:30 to 70 Shore A, rubber keypad: 1 Material: ... made of top grade silicone rubber, non-toxic, environmental safe2 Hardness: ... etching, back-lighted, hard/epoxy coating keypads5 Keypad surface with transparent spraying coating, PU coating6 Automatic painting and laser etching ...