This medical specimen bag features a transparent visible design, with transparency exceeding 95%, combined with advanced leak-proof technology, seal integrity testing pass rate reaching 99.95%. Made of medical-grade LDPE material, thickness of 2.8 MIL, complying with FDA 21 CFR 177.1520 and USP Class VI biocompatibility standards. Using molecular-level heat sealing technology, sealing strength reaching 5.8N/cm, able to withstand 1000 bending tests. Special processing technology ensures specimen integrity remains unaffected within -50°C to 80°C temperature range. Suitable for hospital laboratory departments, pathology departments, and other biological sample collection, supporting multiple marking systems, greatly improving sample traceability accuracy to 99.9%, effectively reducing pre-examination error rate by 85%, an ideal choice for clinical and research sample management.