It is a cover munting type, Normally CLOSED (NC) contact element. This can be fitted with any illuminated/non-illuminated mettalic or plastic head. These contact elements are interchangeable & can be stacked without additional hardware. A maximum of six & four elements can be stacked with non-illuminated & illuminated operating head respectively. They have fully shrouded terminals and are protected against the ingress of small objects during assembly and wiring. The contact elements are single break.