... 6.More than 10,000,000 life cycles 7.Avaliable in various metal dome: round, triangle, four Legs and oblong shape ... (130-230) ±30gf Hand sense (30~65)% ±15% salt spray test 35°±2°,(5±1)% ,48H work temperature -30°C~+70 ... .dign considerations include dome size, material composition, thickness, and mating circuit design which determine the characteristics of tactile feel, actuation force ...