The Renaissance Cooking Systems - Insulating Liner for Pro Burner RSB3A 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 constructing your outdoor kitchen with combustible materials. Cut Out: 16" Wide x 20 1/8" Deep x 10 5/8" High Required when installing a grill into a cabinet constructed with combustible materials.