Intravenous butterflies 25G white Intravenous butterflies 25G x 3/4″ (0.80 x 19mm) from Elmed in individually sterile Peel Pack packaging. Elmed butterflies feature a luer lock end (female) and a triple-beveled, siliconized needle tip to prevent friction. International color coding. Tube: 30cm. Needle: 3/4″ (19mm). Color: white. Indications for use: Peripheral vein 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.