Functional features

it is made of transparent material, and five cylinders of different sizes form different knot spaces.Knot method: single hand knot method, two hand knot method, instrument knot method;Type of knot: single knot, square knot, triple knot and surgical knot, false knot and sliding knot;Simulation of a variety of knotting environment: such as surgical knotting, small incision knotting, abdominal and pelvic deep knotting, large incision deep angle knotting, etc