Teaching agent: Different colors are used to distinguish the different positions, and the colors are bright and easy to excite the students' attention, so they can demonstrate what the student's understanding promotes and the FU increased in class . Material: the PVC materials in food grade, high-quality prototype, solid, unbroken. Almost true depiction of the human lung structure. Made of high quality PVC material, it can withstand frequent use and handling. It has realistic design and colours to enhance your learning experience. It is easy to carry and observe due to its compact size and sturdy base. Removable design: This display model can be removed from the base to enable a careful test of all pages. The stand is located near the base and can be disassembled for easy storage if it is not used. Made from PVC, with a focus on durability and longevity. These materials ensure that the models retain their structure over time, providing reliable use for educational and professional research purposes., Manufacturer: GHJrtHFJ