MediChoice Specimen Bag, Biohazard Printed, Zip Closure, Leak Resistant, Polyethylene, 2 Mil, 8 Inch x 10 Inch, Clear (Pack of 100) All bags include extra outside pocket for paperwork Biohazard symbol provides immediate identification that meets federal regulations and OSHA requirements Slide and adhesive closures suitable for transporting bodily fluids and tissues (not leak proof) Tamper-evident (adhesive closure) bags available for sensitive specimens 2Mil polyethylene material provides sturdy and reliable construction - Not for use in pneumatic system