1)material: made of top grade silicone rubber, non-toxic, environmental safe. 2)hardness:30 to 70 shore a, suggested hardness is 40 to 60 shore a, or depending on clients requriment 3) certificate: iso-9001, rohs approval 4)silk screen printing, spray coating, laser etching, back-lighted, hard/epoxy coating keypads 5)keypad surface with transparent spraying coating, pu coating 6)automatic painting and laser etching process 7)half automatic potting process to add resin on each key top travel0.8-0.5mmforce60-300gramslife cycles1, 000, 000operating temperature-40 To150 storage temperature-50 to 170contact bounce
