New bbq factory Replacement Jenn Air Gas BBQ Repair Kit Grill Heat Plate Burner- 3 Pack?Burner: 15 3/4″ x 2 7/8″ ? Material: Cast Iron?Heat Plate: 17 3/4″ x 6 3/8″ ? Material: Stainless Steel?Costco Kirkland Models: SKU681955?this item include 3pcs of cast iron burners and 3 heat plate / tent;