Weber #85042 Lower Grate for 18.5" Smokey Mtn Cooker Weber 85042 Handled lower cook grate for 18.5" Smokey Mountain Cooker (2009-2012) model 721001. Grate measures 17" in diameter. Rests on the second bracket of the inside straps of the SMC. Thirty pound weight limit. 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