GrillGrate Sets for American Outdoor Grills GrillGrates are a must-have accessory for your AOG gas grill. Whether you sit them on top of your current grates, or use them to replace your factory grates, GrillGrates will make your old gas grill better than new. Made of hard anodized aluminum, they never rust. GrillGrates are reversible, interlocking panels, giving you two grill surfaces in one. Even out those hot and cold spots with GrillGrates and produce juicier, more flavorful food. *GrillGrate is not affiliated with American Outdoor Grill.