Value Pack: You will receive extendable poster tubes of 3 colors in one package, sufficient quantity that would satisfy your daily demands for posters, blueprints, drawings storage and protection. Extendable Size: 3.5 inches in diameter, our blueprint holders could be stretched from 25 to 42.5 inches, considerate design that ease your concern for storing oversized posters, maps, blueprints, drawings, etc. Handy Design: The poster holders have adjustable strips so that you could adjust them to fix your shoulder. With an open lid design, you can take out the contents with ease. And they also have latches to avoid sudden dropping of the contents. Premium Quality: Made of high-quality PP material, the poster carrying cases are durable and comfortable to carry, hard to crack or break. They could definitely do a good job of protecting things inside. Waterproof and Dampproof: Putting your posters in our poster carrying case to protect them from rains and dampness. The poster holders are waterproof and dampproof, keeping your posters dry and bright as before.