<b>Alvin Blueprint Ship Bag 10X44In 100</b> When you ship your blueprints, you need to be sure that they will be safe inside the shipping container. Using a strong shipping bag protects them from being dropped in the street and from moisture damage. These inexpensive shipping containers are .004 mil. thick and ready to take on rain, spills and other dangers that can cause damage to blueprints. Each bag is formulated to accept self-adhesive labels, black markers and ink from pens. To use these bags, just slip your blueprints inside and close the end with tape or staples. Ship your blueprints via USPS, UPS or FedEx without worry about moisture, dirt or dust affecting the way your blueprints look.