Surflo IV Catheter Winged Infusion Set | 18g x 0.75in GreenSURFLO winged infusion sets feature a precisely honed needle with a thin wall design, ensuring easy penetration and continued access with a single insertion. The soft, flexible interlocking wings readily conform to the body of the patient, while the angle of the wings helps position the needle and reduce the risk of vessel damage during venipuncture. Terumo's Surflo Winged Infusion Sets are not made with DEPH and have no natural rubber latex