Weber # 63014 Charcoal Grate for 22.5" Smokey Mountain Cooker Model 731001 Weber # 63014 Charcoal Grate for 22.5" Smokey Mountain Cooker (Model # 731001). Measures 18 3/8" in diameter. Please visit Weber's website to ensure you order the correct parts for your specific grill. It is best to look up by serial #. The following link will also help you find the alpha numeric number. http://help.weber.com/schematics/#serial-number