In virology and cell culture Nunc round and flat-sided tubes have shown excellent performance. The entire surface of each tube is given the Nunclon surface, for good cell attachment and growth. Static culture in round bottomed tubes produces cell growth in a narrow line on the tube side. With a rotator, the entire side of the tube will have growth. Nunc Cell and Tissue Culture Tubes are tested and certified to guarantee uniform quality. The Nunc flat-sided tube provides a horizontal growth area on which cells spread well without using a rotator. It needs no support during incubation. It simply rests on the flat side and cap. The flat-sided tube also provides improved optics over round tubes for microscopic viewing.