... with Membrane Switches, Tactile Feel Metal Dome and Rubber Keypad, Made of PC Key Specifications/Special Features:Embossed overlays ... gold-plated male connector attachment Materials of overlay: polyester and PC Different shape of keys are available Four-color process printing ... , dust-proof, anti-oil, anti-corrosion and erosion of harmful gases proof, acid and alkali proof, quake proof. 4. Low cost ...