If you need to ship or store rolled documents safely, these Yotijay postal tubes are absolutely perfect! The 30cm length (they also come in 40cm, 50cm, 60cm, and 70cm sizes) is ideal for standard posters, artwork, blueprints, and important documents. Made from sturdy 3mm thick cardboard with a 50mm inner diameter, these tubes are seriously durable and can handle the rigors of shipping without crushing or bending. The white end caps on both ends keep everything sealed tight, protecting your contents from dirt, moisture, and damage during transit or storage. What's really convenient is how space-efficient they are - they stack neatly and don't take up much room until you need them. Perfect for artists shipping prints, architects sending blueprints, students mailing posters, or anyone who needs to protect rolled items. The brown cardboard looks professional and the quality construction means you can reuse these tubes multiple times. Much better than trying to roll documents and stuff them in boxes where they can get creased or damaged. Whether you're running a small business, working on creative projects, or just need to mail important documents securely, these tubes give you peace of mind that your items will arrive in perfect condition. Keep a few on hand - you'll be surprised how often they come in handy!