Using 4 Mil Poly Tubing is quick and easy. Simply cut the tubing to the length you need and seal both ends using one of our Impulse Bag Sealers and Closures. Reduce the need to stock various medium to heavy duty size bags that are 4 mil thick. Just make your own. Our 4 mil poly tubing is made from 100% virgin low density polyethylene resin and meets FDA/USDA requirements.