1.Made by top grade silicone rubber, environmental safe material, non-toxic, smooth feel, excellent transmission. 2. The hardness of silicone rubber can be graded between 30 to 80 shore A. 3. Suggested hardness for silicone rubber keypads is 40 to 60 shore A depending on customers' requirement. 4.We can do any kinds of keypads, including P+R keypads, silicone and rubber keypads, conductive keypads, mobile phone keypads, telephone keypads, remote control keypads and so on.