Easily perform routine sampling of serum or plasma. One-piece design features a built-in pipette bulb that allows controlled drawing and dispensing of liquids in drop form. Made of durable, low-density polyethylene plastic, these transfer pipettes can be frozen in liquid nitrogen or heat-sealed for storage. Well-suited for many uses around the lab, including blood culture and urine analysis. Available in assorted sizes; non-sterile and sterile.