Intravenous butterfly needles 19G yellow. Intravenous butterfly needles 19G x 3/4″ (1,10 x 19mm) from Elmed in individually sterilized Peel Pack packaging. Elmed butterfly needles feature a luer lock tip (female) and a triple-sharpened, siliconized tip to prevent friction. International color coding. Tube: 30cm. Needle: 3/4″ (19mm). Color: yellow. Indications for use: Peripheral vein access for therapeutic purposes, sampling of biological material for diagnostic purposes. Repeated short-term injection or injection of small volumes of medicines or blood derivatives. Single blood collection. Difficult or small diameter veins, such as in infants and children, and normal adult veins.