Following a quick assembly, these extra strength double wall cardboard boxes provide robust protection against damage and squashing for your heavy or fragile items. Finish by using packing tape to seal the top and base of these 355x260x305mm durable double wall cardboard boxes which are: Heavy duty, offering a load capacity of 25kg Fast and straightforward to assemble Made from high quality 75% recycled paper Eco-friendly – fully degradable and recyclable Supplied flat packed