Hi Antoinette - This is Sue at GE Appliances. Thanks for viewing! 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. The outside dimensions are 26-7/8" W x 19-1/8"H (JX9152DJBB). Inside dimensions are slightly larger than the overall dimensions of the microwave it is designed to fit (PEB9159DJBB Black). This microwave is 21-3/4" W x 13"H x 20"D. We suggest to view the Quick Specs at: http://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=PEB9159DJ_R2.pdf - Also, you can view the Installation Instructions at the following link for cutout and clearance requirements: https://www.myapstore.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=49-40762-1.pdf - Thanks for checking with us!
Date published: 2017-03-29