The Over-The-Range Microwave Trim Kit includes a stainless steel trim piece that covers the gap between the appliance and the surrounding walls or cabinets. This kit also includes the necessary mounting hardware and installation instructions. This flush piece creates a finished, custom look for your over-the-range microwave. This is an accessory kit that is compatible with many microwave brands; check to see if your model number is compatible. Size is for 30 microwaves. Installing this accessory will require basic hand tools and novice repair experience.