This laboratory biohazard bag features a high-strength self-sealing zipper design, complying with WHO Laboratory Biosafety Guidelines and GB19083-2010 standards, with zipper sealing strength reaching 5.9N/cm and sealing reliability testing pass rate of 99.7%. Made of medical-grade LDPE material, 3 MIL thickness, 92% transparency, and tear resistance strength of 9.2N. The unique dual-track zipper system can withstand 10,000 open-close tests without failure, with special leak-proof edge design completely blocking liquid and aerosol leakage. Suitable for P1-P3 level biological laboratories, clinical testing departments, and pathogenic microorganism research institutions, with effective isolation rate reaching 99.9%, reducing laboratory-acquired infection risk by over 90%, the professional first choice for biological sample handling and medical waste collection.