Intravenous butterfly needles 21G white. Intravenous butterfly needles 21G x 3/4″ (0,80 x 19mm) from Elmed company in individually sterile Peel Pack packaging. Elmed butterfly needles feature a luer lock tip (female) and a triple-sharpened needle with a silicone-coated tip to prevent friction. International color coding. Tubing: 30cm. Needle: 3/4″ (19mm). Color: white. Indications for use: Peripheral venous access for therapeutic purposes, biological material sampling for diagnostic purposes. Repeated short-term injection or injection of small volumes of drugs or blood derivatives. Single blood collection. Difficult or small diameter veins, such as in infants and children, and normal adult veins.