These tough & secure postal boxes have an adhesive strip on both the lid & the side flaps which form a tamper evident seal so there is no need for additional tape or strapping to secure closed. These brown Fastobox postal boxes are easy to assemble & are manufactured from solid single wall rigid corrugated board. They are constructed to have a double thickness base & triple thickness sides which creates added strength to protect & package heavier products. Fastobox is clearly the postal box of choice if you require strength & secure closure. Fastobox postal boxes are delivered flat packed. Need help or want to discuss your requirements? Call 0800 542 44 28 today, speak to our packaging experts & get next day delivery. Sold in packs of 20, priced per box. Quantity Available in packs of 20 boxes. Want to order in bulk? See our discounts for 100 or more boxes. Size & shape options Fastobox boxes start at 145x 130x 55mm & go up to 310x 220x 200mm (Lx Wx H, internal dimensions). Weights & limits These postal boxes are shockproof & rigid with a double thickness base & triple thickness of board on the sides. Materials Manufactured from single wall rigid corrugated board. Environmental information Rajapack postal boxes are 100% recyclable. On average our boxes are made from a minimum of 75% recycled fibres. Delivery information Delivered flat-packed in packs of 20.