... and parts began early 1980.1)Items——membrane switch, keypad, membrane keypad, keyboard switch, switch panel, membrane panel, membrane overlay, membrane faceplate for variety electronic industries. 2) ... - 300g (2 - 10oz)f-2) Tactile type——150 - 400g (6 - 14oz.)g) Switch strokeg-1) Flat type 0.1 - 0 ... Flat type——5,000,000 closures or moreh-2) Tactile type——1,000,000 closures or morej) Surface hardness—— ...