Alright, let's talk about these MagicWater mailing tubes - they're seriously sturdy and perfect for shipping important documents, posters, blueprints, you name it. The 3-ply spiral wound construction means these things won't bend, flatten, or crease no matter what happens during shipping. Your important papers will arrive in pristine condition every time. Each tube is 1.5 inches in diameter and 18 inches long - perfect for standard documents and posters. They come with tight-sealing white end caps for both ends, so nothing's falling out during transit. This pack gives you four tubes, which is great if you ship things regularly or need to store multiple items. They're not just for shipping either - use them for storing artwork, architectural plans, or any other documents you want to keep safe and rolled up. The white color looks clean and professional, and the construction is just solid quality. Seriously, if you're tired of documents getting damaged in the mail or just need a good way to store rolled-up papers, these tubes are exactly what you need. They're simple, they work great, and they'll save you from so much frustration with bent corners and creased papers. Just pop your documents in, snap the caps on both ends, and you're good to go!