Freezerbondz B-490 Polyester Labels for Brady BBP12, BBP11, PR200Plus, PR300Plus and PR600Plus printers. Specially designed for use in extreme environments such as Freezer; Liquid Nitrogen; Hot Water Bath (100C). Ideal for laboratory identification: including centrifuge: eppendorf & PCR Tubes: Conical & large Tubes: Vials & Tubes. Can be applied to frozen surfaces (with overlap) including glass and polypropylene stored in liquid nitrogen.