A:Answer Hi RW1265 - We certainly appreciate your loyalty! Microwave trim kits are not interchangeable. Microwave trim kits are designed to provide a built-in look while also providing air flow necessary to the microwave. A trim kit consists of the trim frame, as well as an upper, lower, and rear duct that attaches to and encases the microwave inside the cabinet cut-out. It is important to only use the trim kit designed for that model so that the trim kit fits the microwave, and provides the proper air flow that it needs. The current GE Profile™ 1.1 Cu. Ft. Countertop Microwave Oven PEM31DFBB (black) is compatible with GE® Optional 27" Built-In Trim Kit JX827DFBB and GE® Optional 30" Built-In Trim Kit JX830DFBB ( PEM31SFSS (stainless): GE® Optional 27" Built-In Trim Kit JX827SFSS / GE® Optional 30" Built-In Trim Kit JX830SFSS). Keep in touch at GEAppliances.com. Sue