This button has a domed blue plastic cover with a black retaining ring around it. There's an optional LED included that will light up the button. The LED has a built in resistor so you can run it up to 12V but given the massive size and shallow depth of the button, it doesn't illuminate the entire button face evenly. The button activates a common arcade microswitch (included), the switch contacts are normally open. When the button is pressed, the contacts close.
Massive Arcade Button with LED - 100mm Blue (0:59)
Micro switch terminals are 0.187" wide, LED connection terminals are 0.25"