Take a look at our wings versus the competition and you'll see why SURFLO® is a very well recognized brand. Terumo's soft, flexible interlocking wings 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.