Bounded introducers, proximal accurate and easy positioning.


Unique lengthways clearanle, compliable and retraltable design.


No bending stress, compliable with the intestines, less contradictions.


When transversely compressed, no changes in lengthways forces and dimensions, less stimulate and replacement.


Possible to be discharged by specific mechanism.


The cup-mouth-spherial shape end together with silicone edge design decreases hyperplasia.