Panasonic 27-Inch Trim Kit for 1.5 cuft Panasonic Stainless Convection Microwave Ovens, NN-TK903S 27-Inch Wall Installation for all 1.5 Panasonic Convection Stainless Steel Microwaves 27-Inch W by 19 1/2-Inch H Outside Dimensions and 24 3/4-Inch W by 14 3/8-Inch H Inside Dimensions Cabinet Cut-out is 24 7/8-Inch W by 18 1/16-Inch H by 21-Inch D Models included for this trim kit are NN-CD989S and NN-C994S Installation required, all parts included for easy installation