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. For use with Frigidaire Gallery Microwave model GMBS3068AF.