M21-750-488 Continuous Label Roll Cartridge, Label Color White, Label Finish Matte, Label Material Polyester, Label Width 3/4 in, Material Properties Autoclavable, Cryogenic, Ribbon Color Black, Roll Length 21 ft, Vial/Tube Size 2.0 to 50.0 ml, For Print Method Thermal Transfer, Maximum Service Temperature 293 Degrees F