Lost in Utah, I used a regular grill and four and five inch 3/8 stainless bolts. I used what they call fender washers as they are larger outside diameter. The Egg folks also make a Two inch fire ring that allows you to use a taller second grill. Hope this help you out. Some hardwares carry stainless bolts. We have a fastner store loacl that has all sizes.Good Eggin' Poppasam
