This beautifully crafted custom CNC solid wood arch spandrel cabinet mullion door insert is a precision-engineered decorative framework measuring 43⅝ inches tall × 7 13/16 inches wide, designed to sit inside an existing cabinet door opening to create a classic divided-light glass panel effect with a distinctively refined upper corner arch spandrel detail.

What sets this mullion insert apart from anything else on the market is our signature one-piece construction — the entire frame, arch spandrel, and all moulding profiles are CNC-machined from a single solid piece of wood or MDF with zero joinery, zero glued connections, and zero risk of joints opening, shifting, or failing over time. This means every insert that leaves our workshop is dimensionally perfect, structurally seamless, and built to last the lifetime of the cabinet it serves.

The signature corner arch sweeps a graceful 7 7/16-inch radius from the vertical stile across to the top rail in one continuous clean arc — a hallmark of Arts & Crafts, Craftsman, and transitional cabinet design that instantly elevates standard kitchen cabinetry, display cabinets, hutches, and wardrobes from ordinary to architecturally considered. The mullion insert features a double-profiled ogee moulding section — the outer frame and inner arch spandrel sharing the same precisely CNC-machined profile for perfect visual continuity and a seamlessly crafted appearance throughout.

Once installed, a glass pane is set behind the mullion framework — creating the beloved traditional divided-light look that brings depth, light, and heritage character to any cabinet door. Available in both premium solid hardwood and precision CNC-cut MDF, this insert is supplied unfinished and fully ready for paint, stain, or lacquer — making it equally versatile for painted kitchen cabinets and natural wood furniture pieces. Ideal for kitchen cabinet upper doors, display cabinet glass inserts, hutch door panels, wardrobe door overlays, and bespoke built-in cabinetry wherever a clean, architectural divided-light door detail is the goal.