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