Durable and transparent: This biohazard specimen bags is 6"x9" in size and comes in a total of 200 pieces. It is made of LDPE material, which is clean and odorless and has good moisture-proof performance. Sealed zipper: Each sealed specimen transport bag is equipped with a zipper seal, which can be opened and closed repeatedly. The zipper has reliable performance and effectively prevents sample loss. It protects the sample safety during storage or transportation. Biohazard logo: The biohazard specimen transport bag is printed with a striking biohazard pattern to remind users to operate with caution, which is very suitable for sample management in laboratories or strict environments. External bag design: The specimen zip bag has an independent external document bag that can be used to store documents or labels to avoid mixing labels with samples, and is convenient for quickly putting in and taking out notes or documents to improve processing efficiency. Wide range of uses: This laboratory specimen bag and specimen collection bag are suitable for experiments, research and education purposes, and can safely and efficiently store a variety of samples.