For a stylish built-in look, use the Stainless-Steel Microwave Trim Kit with your Frigidaire 2.2 CU. Ft. Built-In Microwave. This trim kit is designed with a smooth Smudge-Proof® stainless-steel finish, and will help complete your kitchen design. A trim kit is required for installation of your built-in microwave and includes all the necessary hardware for installation into a cabinet, wall, or over an electric wall oven. Available in a variety of colors and sizes.