The Stainless Steel Insulating Liner Sleeve for the RDB1 & RDB1EL Double Side Burner-The RCS stainless steel grill liner jackets helps protect your outdoor kitchen from the high heat your grill produces. Custom made to fit RCS grills, each grill insulating jacket features durable double-lined 304 stainless steel construction for maximum strength and protection.+ This product is required when installing the RDB1 & RDB1EL side burner into a cabinet constructed of combustible materials. 304 Stainless Steel, Fits: RDB1 & RDB1EL, Cut Out: 14 3/8" wide X 20 1/4" high X 9 1/4" deep. This product ships in approximately 1 days