1.Structure:made by FPC cooper foiled circuit metal dome 3.ISO9001:2008,RoHS 4.environmently material,100% tested before sent This is a metal dome tactile FPC membrane switch for hotel calling device Component 1. Overlay Materials: Polyester or Polycarbonate2. Rear Adhesive: 3M 467MP, 3M 468MP, or other 3M adhesive3. Standard Tolerances: +/-.02mm.4. Matching color: Pantone and RAL color matching ...