Terumo Surflo™ Winged Infusion Set 21G x 3/4" (SV21BLK). SURFLO™ Winged Infusion Set is soft, with flexible interlocking wings that readily conform to the body's contour. The wing is angled for ease of positioning of the needle during venipuncture, for less risk of vessel damage or occlusion of the lumen. The precisely honed needle with Ultra-Thin wall design assures ease of penetration and continued access with a single insertion. DEHP Free Labeling. Color-coded: Green. 50/BX. Priced per box.