Cartek replacement buttons to suit most of the Cartek range. These buttons suit the Standard, GT and XR range on isolators. We have the internal button with LED light and also the 3 different colour options of external button. Also listed is the Cartek Fire Extinguisher Button. This button connects into the battery isolator circuit so if the fire extinguisher system has been activated the battery isolator will kill the engine and isolate the battery.