We produce trocars for laparoscopic surgery. The gas injection valve, sealing cap, and conversion sealing cap of our trocar have good sealing performance, and there  no obvious leakage after 4KPa air pressure. The gas blocking valve of the trocar  have good gas barrier properties. After 4KPa air pressure, less than 20 bubbles will pop up. It mainly has a patented eagle mouth design, which can reduce the risk of visceral injury by expanding the tissue gap.