suction cannula for gynecological operations .The soft, rounded tip of the GSTC Karman Cannula is intended to reduce tissue damage and increase patient comfort. It is made from flexible, medical-grade, biocompatible plastic and comes in a range of sizes (4 mm to 12 mm) with color-coded hubs and graded markings for easy size recognition. The smooth-walled, transparent tube guarantees compatibility with common manual vacuum aspiration (MVA) devices and permits contents viewing.