Usage: All popular brands of printers for receipts in POS system, cash registers, calculators, adding machines and EFT POS terminals;Size:37mmx50mm, 44x70mm, 57mmx50mm, 76mmx76mm, 80mmx70mm, 80mmx80mm, 3 1/8’’×220’, 2 1/4’’×85’, etc.Core: cardboard or pla