Poly Bags on a Roll - 1 Mil Industry standard core makes these bags 100% compatible with all automatic packaging equipment. •Roll converts from 1" to 3" core. •Bags are pre-opened at one end for easy insertion and pre-sealed at the other end. •Perforated for easy tear-off. •Manufactured from 100% virgin film. •Meets FDA and USDA specifications. •Close bags with Twist Ties, Bag Tape or with Impulse Sealers.