Closed Wound Drainage Kit contains three parts, including the silicone bulb, silicone drains, and stainless steel trocar. It is commonly used as a post-operative drain for collecting bodily fluids from surgical sites. The drains come in flat and round forms, available in varying sizes. Both the drains and bulb are made of medical-grade silicone.

This kit is a tool that creates a negative pressure state at the suction head, allowing material outside the suction head to be squeezed toward it to complete the "suction" effect. It is primarily used for medical drainage, expectoration, sewage blood, and secretions.