Vaku 8 Needle tube is made from cold roll stainless steel. The needle tube is thin walled which allows a larger internal diameter resulting in improved flow rate. op cover are made of medical grade PP. It give protection to needle from damage. Lower covers are made of medical grade PE. Flexible rubber tube covers the backside of needle tube. This act as end blood stopper when is withdrawn from sample tube. To minimize trauma and with short Bevel to minimize risk of vein cross perforation.