17.5″ Stainless Steel 7639 Cooking Grates for Weber Spirit 300 Series, Spirit 700, Genesis Silver B/C, Genesis Gold B/C, Genesis Platinum B/C, Genesis 1000-3500, 7638. Prefect Fits: Fits Spirit 300 series, Weber Spirit 3 burner Gas grill E/S 310/320/330, SP-320.