100% Recycled Material: Large letter boxes are made of Triple-wall 125K & K e-flute cardboard. The cardboard letter box has strong cardboard material and stable design which protects against damage to the products, providing extra protection to small and flat parcels during transportation. Made from 100% recycled material & 100% corrugated cardboard. They are Hassle free recycled Reduce Postal Costs: Large letter postal boxes A4 are great option for people or businesses, wishing to reduce postal costs while providing a well-presented solution to their customers. Specifically designed to send accessories and low-depth items—such as tablets and iPads—in the mail while reducing postage expenses. Making your products very presentable. Small To Medium Businesses: Our letter box boxes for posting are suitable from shipping mobile accessories, books, CDs, DVDs, documents, jewellery, gifts, computer spare parts and many more light weight fragile items. They are perfect for these small items because they provide extra protection during transportation. Perfect for sending small goods and items in a safe and secure manner to your customers, family, or friends in small to medium businesses and households.