The Sunstone 3 In. by 3 In. 90 degree corner spacer panel for front of cabinet is creates a perfect 90 degree corner between any two cabinets or other opposing spacer panels. The panel is measured at 3 In. by 3 In. width x 42 In height at a 90 degree inside radius corner, plus add approximately 2 In. additional for the top crown molding panel. The crown molding panel comes standard with all full height and upper wall cabinets, most often this panel will be used for adding an attractive cover for any debris, or loose electrical wiring etc. which may be sitting on top of wall cabinets. It is constructed with all 304 stainless steel with a #4 brushed finish matching with all other sun stone cabinets and products. It is easily installed with simple open screw holes that secure tightly between two other opposing wall cabinets and comes with two wall support rails which interlock with other wall cabinet rails creating a continues horizontal wall support.