RAFI-USA INC part 1.01.102.011/0104 is a non-illuminated pushbutton with a mounting hole diameter of 18.2 mm. This pushbutton features screw terminals for easy installation and has a contact configuration of 1 NC (Normally Closed) + 1 NO (Normally Open). It comes in a sleek black color, making it a stylish and functional choice for various industrial applications.