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.