This is a rather hard to find original Sumter Plugoscillator magneto trip finger for a Fairbanks Morse Z engine. I believe it fits the 3 and 6hp Z engines but may fit others as well. It measures about 5 3/8 inches long overall. It is about 3/4 inch long through the 1/2 inch pivot hole. It is NOS, new old stock with no cracks, breaks, or repairs of any kind and fresh from the unused inventory of an old hardware store. It is ready to be used on an engine. It would also make a great spare on the shelf. Let the pictures be your guide.