You'll have to put a couple together to get the size needed. I don't remember which ones exactly but my standard Craftsman's valve adjustment feeler gauge set had the right ones. Once you add a couple of them together you'll get pretty damn close. I looked around for a few weeks to try and find the size in the FSM and I never found them. Also keep in mind that the thickness isn't "exact" so you'll make the necessary compensation when adjusting the TPS. It might sound complicated but it's not.