The Stainless Steel Insulating Liner for the RCS Premier Series RJCSSB & RJCSSBL Double Side Burner-The RCS stainless steel side burner liner jacket helps protect your outdoor kitchen from the high heat your side burner produces. Custom made to fit RCS side burners, each insulating jacket features durable double-lined 304 stainless steel construction for maximum strength and protection. The insulating liner is required when installing the RJCSSB & RJCSSBL double side burner into a cabinet constructed with combustible materials. 304 Stainless Steel, Fits: RJCSSB & RJCSSBL, Cut Out: 12 7/8" wide X 22 1/8" deep X 9 5/8" high.