US Warehouse - FREE FAST Shipping in USA Product Description: ?Compatibility?Fits Weber Spirit 300 series grills. Fits Spirit E310, Spirit E320, Spirit E330, Spirit S310, Spirit S320, Spirit S330. Fits Weber Genesis Silver B Genesis Silver C, Genesis Gold B Genesis Gold C (2002+), Spirit 700, Weber 900, Genesis I - IV, Genesis 1000 - 3500, Genesis Platinum I II, Genesis Platinum B/C(2000 - 2010). Fits Weber Spirit II 300 series ?Dimension?17.5 x 11.9 inch for each grate, 17.5 x 23.8 inch for two units. Material: Cast Iron. Package: Cooking Grid Grate x2 ?Extremely durable?Made of durable cast iron to ensure long-lasting use. Do not chip or rust out like the enameled bars, more durable and leave beautiful grill marks on the food ?Retain heat?Cast iron grates not only heat evenly and retain heat superbly, but also deliver professional searing, able to give prominent sear marks to meat/ veggie ?HOW TO AVOID RUST??(1) Make sure that you scrape your grates after each use; (2) Season them by brushing with oil after each use; (3) Leave the dampers open a bit so that condensation does not collect in the grill; (4) Put the lid back on your grill when it is not in use; (5) Cover the grill when it is not in use; (6) If you need to store your grill for a long period of time, heavily coat them in cooking oil, wrap them in a plastic Thank You for Shopping!