A trainer designed for teaching all essential surgical knot-tying techniques, including the one-handed reef knot, instrument tie, surgeon’s knot, slip knot, tying in a small opening, tying at depth vertically in a large opening, and tying at depth at an angle in a large opening. Packaging details: 8 pcs per carton, measuring 58 × 45 × 50 cm, with a total weight of 14 kg.