GrillGrates for The 18.5" Weber Kettle Grill and Jumbo Joe GrillGrates for the 18.5" Weber Kettle Grill and Jumbo Joe ELIMINATES FLARE-UPS: Stop shuffling your food around to avoid charring. GrillGrates patented design eliminates flare ups so common to all gas grills. The raised rails amplify heat while aluminum conducts heat efficiently to eliminate those pesky hot and cold spots. NEVER RUSTS: Made from highly conductive hard anodized aluminum. EVEN HEAT: No more hot spots or cold spots BOLD SEAR MARKS: GrillGrates deliver restaurant quality sear marks every time. Great for Pizza, Fish, Vegetables