The Fire Grate improves the airflow of your campfire. It simply sits in the bottom of the pit and raises the logs off the floor to provide more spacing around the logs. The grate is especially useful when building a fire because it hold all your tinder and logs together in a tipi. Built with a sturdy 1/4" thick steel grid, the Fire Grate can endure the heat of the fire, and often turns red hot!The Medium Fire Grate fits the 24", 30", & 36" Cupola, 2' Cube, 2' Cottager, 3' & 4' Pyramid, and 4' & 5' Chiminea.