For a stylish built-in look, use the 30 Inch Dark Stainless-Steel Microwave Trim Kit with your Frigidaire Gallery 2.2 CU. Ft. Built-In Microwave. This trim kit is designed with a 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. For use with Frigidaire Gallery Microwave model GMBS3068AF.