Made in USA KettlePizza Prograte and Tombstone Combination Kit for 22.5-Inch Kettle Grills, KPPG-22 Installs on 22.5" kettle grills to make a superior pizza cooking surface Openings on sides allow easy refueling, firebox in rear allows extra heat to circulate in grill dome Works with 22.5" kettle grills and 22.5" Kettle Pizza inserts such as KPB-22 Cooking grate is 304 stainless steel, tombstone shaped pizza stone is made of 5/8" cordierite All components proudly Made in USA with the highest grate materials