Aly Packaging manufactures custom corrugated boxes for UK e-commerce brands, retail distributors, and wholesale logistics operators. The structural decision that separates a corrugated box that survives courier handling from one that fails in transit is flute grade matched to product weight and fragility. An E-flute carton compresses more than a B-flute box under stack load, and a C-flute specification is neither. Too soft a grade and the product inside shifts during courier delivery, creating damage claims. Too stiff a grade and you are paying for protection you do not need. We specify flute grade from your product weight and fragility profile before the dieline is cut.