... .Sensitive 3.Long life and competitive Description : 1. The push button adopts zinc alloy body with anti-impact design , the surface ... .2. According with standard ISO4190, EN81,GB /T24477 3. the contact type :1NO,1NC,2No,2NC,1NO1NC.4. the locknut (regular ... type, super thin type )push button are installed into thickness 1.2mm to 3mm faceplate . 5 ...