Thermal rolls are designed for route delivery & service-related receipts in portable printers. They are easy to use. Simply drop them in the portable printer's cradle & feed the paper. End-of-roll warning feature keeps you prepared for replacement time. The recyclable 3/8" core of the roll & the packaging are made of plastic. The 4-3/8" x 127' thermal roll is made with BPA-free & FSC Certified thermal paper.