Weber accessories are made to provide the same durable performance as our grills, so grilling can be a success every time. Flip-up sides allow the easy addition of briquettes for indirect cooking. Replacement hinged cooking grates, are made of plated steel. Grates have curved handgrips that can hang from Kettle handles. Fits 18-1/2" kettles. The grate itself measures 17-1/2" in diameter to sit appropriately in the Weber Kettle grill as designed..Weather Resistant