Please note: The first number is width and the second number is length. Ex: 2" wide by 1" long. Label media is not interchangeable between LX400 and LX810 Color Label Printers. The LX810 has 6" (152mm) maximum diameter on a 3" (76mm) core. The LX400 has 5" (127mm) maximum diameter on a 2" (50.8mm) core. All standard label stock is perforated and the standard corner radius is .125".