4 leg metal dome array: Used in the keypads of mobile phones, electronical toys, playstations, mp3, mp4, ect. 4 leg metal dome array:1.Simple structure,good feeling 2.Travel:0.18+-0.03mm3.Feel:50%±10%. 4.life cycles:>1millionMembrane metal domeThis type is somehow similar to single layer type by means of metal dome contacts attached under Maylar. But the difference is that, in this type, the ...