12" x 1000' High Clarity Polypropylene Tubing allows you to create the exact size bag you need for your product, while protecting the quality and freshness of your consumable goods. 2 mil 12" x 1000' Crystal Clear Polypropylene Tubing is transparent, resists moisture, and is FDA and USDA compliant. 12" x 1000' Polypropylene Tubing is normally sealed by heat sealing but also can be closed with twist ties or bag tape.