1. Marked nominal dimension，because each part can be deformable and can be permitted to have dimensional tolerance±10mm.
2. The product can adjust the size according to the clinical requirements.
3. The main material of product is medical polyurethane and silicone rubber.
●The tension of the materials can be used to open the incision, and better operation vision can be obtained.
●The product has even force to the incision, can lower tissue damages to the minimum, and can keepthe incision state.
●The product is closely combined with incision, lowers the infection possibility, and can effectively prevent the contact between cut organs and abdomen cavity.