Transparent plexiglass training model designed for teaching, observation, and independent practice of deep structure knotting. Key benefits Clear visualization for instruction and review: transparent plexiglass lets instructors and learners observe technique and hand positioning without obstruction. Supports selfdirected practice: selfoperating design allows individuals to practice knotting skills independently. Realistic tactile simulation: a magnetic tension system replicates tissue resistance while parallel elastic strips mimic the presence and behavior of small vessels. Versatile knotting spaces: three different cylinder types create multiple working areas and depth scenarios for varied training tasks. Compact and portable: base measures 20 by 20 cm and overall height is 19 cm, making the model easy to position on training tables or transport between sessions. Easy to assemble and disassemble: modular parts allow quick reconfiguration and straightforward cleaning or replacement of components. Broad compatibility: suitable for use with standard suturing instruments and common knotting techniques. Features and specifications Material: transparent plexiglass for durability and unobstructed observation. Base size: 20 by 20 cm. Height: 19 cm. Simulation elements: magnetic system for adjustable tissue tension, parallel elastic strips to simulate blood vessels, and three cylinder types to create varied knotting spaces. Modular construction for flexible setup and maintenance. Typical use scenarios Skills labs and workshops: set up multiple units for handson instruction in knottying and deep structure practice. Individual practice sessions: learners can rehearse techniques independently, review hand placement through the transparent housing, and adjust tension to mimic different tissue conditions. Demonstrations and teaching: instructors can demonstrate approaches and allow students to observe internal mechanics while practicing on the same model. This model provides a reliable, easytouse platform for practicing deep structure knotting techniques with clear visual feedback, modular adaptability, and realistic tension simulation.