Wound Drain Tube S-Vac® Full Fluted Type With Trocar 4 Channel Type 7 Fr. Size Sterile #322212UOM 1 PER EACH Features 7mm Flat, Full Fluted, 4 Channel Drain S Vac Fluted Channel Drains are designed to provide superior drainage and increased patient comfort to help facilitate early patient ambulation and improved surgical recovery time Fluted Channel Design minimizes the chance of tissue in growth creating the blockages that can cause premature drain removal when using standard drains. Soft, flat drain hubs offer enhanced patient comfort.