Stainless steel construction for outstanding durability Required if grill is being built into a combustible surface Self rimming design ensures a clean, professional install and smooth integration Engineered specifically for Alfresco 36-in built-in grills to offer precision fit Alfresco Insulated Jacket For 36-Inch Built-In Gas Grills - AIJ-36. AIJ-36. Insulated Grill Jackets. This Alfresco Insulated Jacket features all commercial stainless steel construction and self-rimming design for a clean installed look, as well as a safe installation when built-in to combustible surfaces. For use with the Alfresco 36-inch built-in gas grills....