Significant advantage Easy to take things and put things, emergency can quickly release the pneumoperitoneum, providing surgeons with more operation possibilities Silicone double sealing ring Good biocompatibility; The dynamic and static combination achieves excellent air tightness, good flexibility of the sealing ring, low resistance, and high smoothness of the equipment Humanized design The holding place adopts arc flow shape, which is ergonomic design; The luer interface can be rotated 180° for easy operation Inverted triangle ring design Avoid the sleeve sliding when the instrument enters and leaves, and the abdominal wall is well fixed