Internal dimensions: 377x291x84 mm. The internal dimensions allow for precise and secure packaging of products. External dimensions: 400x300x90 mm. The external dimensions are suitable for efficient storage and transportation. Cardboard type: 3-ply corrugated cardboard Fluting type: B-flute Weight: 420 g/m² FEFCO number: 0427 Hand-folded cardboard Additional "ears" for secure closure Decorative packaging - ideal for packaging gifts and gift sets Marketing packaging Black colour: elegant, eye-catching, distinctive, precisely manufactured For shipping: InPost Dimensions B, Poczta Polska Letter L, Poczta Polska Paczka A, Pocztex M, Orlen Paczka M What is a black cardboard box 400x300x90 mm used for? A black cardboard box 400x300x90 mm is ideal for packaging gifts and promotional materials. The cardboard used provides a good balance between strength and weight. Cardboard weight: 420 g/m². The cardboard weight guarantees sufficient protection for the contents. FEFCO: 0427. FEFCO construction is a proven standard in the packaging industry.