Key Specifications/Special Features: Overlay materials: polyester with British brand of AUTOTYPE, polycarbonate with American brand of GE or with Germany brand of Bayer Rear adhesive: 3M 467MP, 3M 468MP and more Tail, pin and circuit layout: subject to customers detailed requests Type of switch: Non-tactile Tactile with stainless steel domes Tactile with Mylar domes Material for electronic circuit sheet: polyester, PCB (rigid printed circuit board) or FPC (flexible printed