Singlewave corrugated cardboard, white on one side and brown kraft on the other, designed for sturdy, precise craft and model work. Key benefits Adds rigidity and structure to projects, making models, boxes, and reinforced documents more durable. Clean white surface for better visual finish and neater presentation. Orientation of the corrugation along the long edge increases bending resistance where you need it most. Machinecut straight edges with no creases for consistent, readytouse sheets. Product features Pack of 20 sheets. Size: A4 210 x 297 mm. Thickness: 4 mm. Construction: singlewave corrugation formed by two smooth faces and one fluted layer. Color: white face, brown kraft reverse. Cuts cleanly with a cutter or scissors. Precision dimensioning and machine trimming for uniformity. How it solves common problems Prevents flimsy edges and sagging in paper models and constructions by providing a rigid substrate. Improves the appearance of finished projects with a clean white face that hides printing or adhesive marks. Simplifies handling and assembly thanks to straight, crease edges and consistent thickness. Practical applications Scrapbooking and cardmaking: add sturdy mounts, backing layers, or decorative bases that hold shape. Model making and architectural mockups: build walls, floors, and structural elements with reliable bending resistance. Document reinforcement and packaging: strengthen envelopes, folders, or small parcels that need extra support. Usage tips For strongest bends, align the corrugation channel along the longest side of the sheet. Score lightly before folding to reduce fiber breakage when a clean crease is required. Compatible with common adhesives, paints, and craft tools for versatile finishing options.